however , we continue to evaluate other mineral properties for acquisition , and we hold a portfolio of mineral exploration properties and assets for future sale , joint venture or to create a royalty up to the development stage of the project ( development activities include , among other things , completion of a feasibility study for the identification of proven and probable reserves , as well as permitting and preparing a deposit for mining ) . at that point , or sometime prior to that point , we would likely attempt to sell a given mineral property , pursue its development either on our own , or through a joint venture with a partner that has expertise in mining operations , or obtain a royalty from a third party that continues to advance the property . although our mineral properties may be developed in the future by us , through a joint venture or by a third party , we have never developed a mineral property . in addition to focusing on its mineral exploration properties and the evaluation of mineral properties for acquisition , solitario also evaluates potential strategic corporate transactions as a means to acquire and interest in new precious and base metal properties and assets with exploration potential as well as other potential corporate transactions and combinations determined to be favorable to solitario . our geographic focus for the evaluation of potential mineral property assets is in north and south america ; however , we have conducted property evaluations for potential acquisition in other parts of the world . at december 31 , 2019 , we consider our carried interest in our florida canyon project in peru and our interest in the lik project in alaska to be our core mineral property assets . in addition , at december 31 , 2019 , we have one exploration property in peru . we are conducting independent exploration activities in peru and through joint ventures operated by our partners in peru and the united states . we conduct potential acquisition evaluations in other countries of both south and north america . as of december 31 , 2019 , we have significant balances of cash and short-term investments that we anticipate using , in part , to fund planned 2020 exploration , to further the exploration of our lik project , conduct exploration on the la promesa project in peru , and to potentially acquire additional mineral property assets . the fluctuations in commodity prices of base and precious metals has contributed to a challenging environment for mineral exploration and development , which has created opportunities as well as challenges for the potential acquisition of advanced mineral exploration projects or other related assets at potentially attractive terms . in analyzing our activities , the most significant aspect relates to results of our exploration and potential development activities and those of our joint venture partners on a property-by-property basis . when our exploration or potential development activities , including drilling , sampling and geologic testing , indicate a project may not be economic or contain sufficient geologic or economic potential we may impair or completely write-off the property . another significant factor in the success or failure of our activities is the price of commodities . for example , when the price of zinc is down , the value of zinc-bearing mineral properties decreases ; however , when the price of zinc is up it may become more difficult and expensive to locate and acquire new zinc-bearing mineral properties with potential to have economic deposits . 28 the potential sale , joint venture or development of our mineral properties will occur , if at all , on an infrequent basis . historically , we have recorded revenues and met our need for capital in the past through ( i ) the sale of properties and assets ; ( ii ) joint venture payments , including delay rental payments ; ( iii ) a royalty sale on our former mt . hamilton property ; ( iv ) the sale of our shares of vendetta and kinross common stock ; ( v ) long-term debt secured by our mineral property ; ( vi ) short-term margin borrowing ; and ( vii ) issuances of common stock . during 2019 we recorded mineral property income of $ 408,000 from the royalty sale , discussed above . during 2018 we recorded mineral property income from the sale of our yanacocha royalty of $ 502,000. in 2015 we recorded a gain on the sale of our interest in mount hamilton llc of $ 12,309,000. during june 2012 , we sold a royalty interest in our mt . hamilton project to sandstorm gold ltd. for $ 10,000,000. previous to the sale of our interest in mt . hamilton llc , our last significant cash proceeds from a property or asset sale were recorded in 2000 upon the sale of our former yanacocha property for $ 6,000,000. proceeds from the sale or joint venture of properties , although significant when they occur , have not been a consistent annual source of cash and would occur in the future , if at all , on an infrequent basis . we have reduced our exposure to the costs of our exploration activities in the past through the use of joint ventures . although we anticipate the use of joint venture funding for some of our exploration activities will continue for the foreseeable future , we can provide no assurance that these or other sources of capital will be available in sufficient amounts to meet our needs , if at all . ( c ) . story_separator_special_tag our net 2019 mineral and surface property rental and option payments , included in exploration expense , were $ 13,000. our 2020 total exploration property rentals and option payments for properties we own , have under joint venture , or operate are estimated to be approximately $ 859,000. assuming that our joint ventures continue in their current status and that we do not appreciably change our property positions on existing properties , we estimate that our joint venture partners will pay on our behalf or reimburse us approximately $ 816,000 of these annual payments . these obligations are detailed below under “ contractual obligations . ” in addition , we may be required to make further payments in the future if we elect to exercise our options under those agreements or if we enter into new agreements . 32 environmental compliance we are subject to various federal , state and local environmental laws and regulations in the countries where we operate . we are required to obtain permits in advance of initiating certain of our exploration activities , to monitor and report on certain activities to appropriate authorities , and to perform remediation of environmental disturbance as a result of certain of our activities . historically , the nature of our activities of review , acquisition and exploration of properties prior to the establishment of reserves , which may include mapping , sampling , geochemistry and geophysical studies , as well as some limited exploration drilling , has not resulted in significant environmental impacts in the past . we have historically carried on our required environmental remediation expenditures and activities , if any , concurrently with our exploration activities and expenditures . the expenditures to comply with our environmental obligations are included in our exploration expenditures in the statement of operations and have not been material to our capital or exploration expenditures and have not had a material effect on our financial position . for the years ended december 31 , 2019 and 2018 , we have not capitalized any costs related to environmental control facilities . we do not anticipate our exploration activities will result in any material new or additional environmental expenditures or liabilities in the near future . contractual obligations the following table provides an analysis of our contractual obligations : replace_table_token_11_th ( 1 ) lease obligation on our wheat ridge colorado office . ( 3 ) mineral property payments under lease and property claim and concession payments for the next year , net of joint venture payments . ( g ) . exploration joint ventures , royalty and other properties the following discussion relates to an analysis of our anticipated property exploration plans as of december 31 , 2019. please also see note 2 , “ mineral properties , ” to the consolidated financial statements in item 8 , “ financial statements and supplementary data , ” and our discussion of our properties under item 2 , “ properties ” of this annual report on form 10-k for a more complete discussion of all of our mineral properties . florida canyon the florida canyon project is an advanced-stage high-grade zinc project in peru . based on extensive exploration and development work conducted to date , we believe the property has potential to be developed into a mine over the next several years . the project is held in a joint venture between nexa ( 61 % ) and solitario ( 39 % ) . solitario and nexa jointly completed a pea in 2017 that incorporated a variety of nexa-generated prefeasibility studies into the analysis . the pea evaluation included resource estimation , mining and processing recovery estimates , a preliminary mining and processing plan , infrastructure layout , environmental considerations and an economic analysis based on certain base case parameters . the pea envisioned an underground mining operation with a 2,500 tonne per day floatation mill for processing , resulting in a 12.5-year mine life . concentrates would be trucked to nexa 's cajamarquilla zinc smelter facility in lima , peru . the terrain at florida canyon is steep and previous project access supporting surface and underground work programs was conducted by helicopter . the lack of road access restricted the scope of field activities to further advance the project . during 2019 limited work was undertaken on road access to the project , and nexa expects to continue to work on completing the road access during 2020. during 2019 , nexa completed the drilling program and several significant drill intercepts were encountered . solitario reported the results of the drill intercepts during 2019. nexa is evaluating the results of the drilling program and solitario anticipates nexa will continue the exploration of florida canyon during 2020. should nexa complete the road , heavy equipment will be able to enter the project area and allow feasibility related activities to proceed more efficiently . important future activities that may be facilitated by the completion of the road are the construction of an underground tunnel into the karen-milagros high-grade zinc zone , detailed underground resource/reserve definition drilling , surface drilling designed to increase the project resources and additional feasibility-related studies . solitario 's payments of $ 1,580,000 related to the drilling program are in the form of an advance on solitario 's commitment to fund 30 % of any future development of florida canyon under the original joint venture agreement between solitario and nexa . accordingly , in the event florida canyon is developed , which can not be assured at this time , the funds paid to nexa related to the drilling program , will reduce the amount of solitario 's obligation to fund 30 % of future development costs , and / or repay any loans from nexa for future development costs at florida canyon . 33 lik project the lik project is an advanced-staged high-grade zinc project . the project is held in a joint venture between teck ( 50 % ) and solitario ( 50

cash as of december 31 , 2019 , we had $ 574,000 in cash . we intend to utilize a portion of this cash and a portion of our short-term investments , discussed below , to fund our ordinary overhead , operational costs , exploration activities and the potential acquisition of mineral properties and other assets over the next several years . we may also use a portion of these assets to repurchase shares of our common stock , pursuant to the terms of a stock buy-back program discussed below . short-term investments as of december 31 , 2019 , we have $ 6,829,000 of our current assets in united states treasury securities ( “ usts ” ) with maturities of 30 days to 17 months . the usts are recorded at their fair value , based upon quoted market prices . the usts are highly liquid and may be sold in their entirety at any time at their quoted market price and are classified as a current asset . we anticipate we will roll over that portion of our usts not used for operating costs or mineral property acquisitions as they mature during 2020. marketable equity securities our marketable equity securities are classified as available-for-sale and are carried at fair value , which is based upon market quotes of the underlying securities . we owned 100,000 shares of kinross common stock at december 31 , 2019. the kinross shares are recorded at their fair value of $ 474,000 at december 31 , 2019. as of december 31 , 2019 , we own 14,350,000 shares of vendetta common stock recorded at their fair market value of $ 556,000 based upon quoted market prices .


 Write a concise suspicious activity report of the following text delimited by triple backquotes. Return your response as a formal report which covers the key points highlighting the location,dates,entity names and account holder information in chronological order of the text.
     ```cash as of december 31 , 2019 , we had $ 574,000 in cash . we intend to utilize a portion of this cash and a portion of our short-term investments , discussed below , to fund our ordinary overhead , operational costs , exploration activities and the potential acquisition of mineral properties and other assets over the next several years . we may also use a portion of these assets to repurchase shares of our common stock , pursuant to the terms of a stock buy-back program discussed below . short-term investments as of december 31 , 2019 , we have $ 6,829,000 of our current assets in united states treasury securities ( “ usts ” ) with maturities of 30 days to 17 months . the usts are recorded at their fair value , based upon quoted market prices . the usts are highly liquid and may be sold in their entirety at any time at their quoted market price and are classified as a current asset . we anticipate we will roll over that portion of our usts not used for operating costs or mineral property acquisitions as they mature during 2020. marketable equity securities our marketable equity securities are classified as available-for-sale and are carried at fair value , which is based upon market quotes of the underlying securities . we owned 100,000 shares of kinross common stock at december 31 , 2019. the kinross shares are recorded at their fair value of $ 474,000 at december 31 , 2019. as of december 31 , 2019 , we own 14,350,000 shares of vendetta common stock recorded at their fair market value of $ 556,000 based upon quoted market prices .
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 Suspicious Activity Report : however , we continue to evaluate other mineral properties for acquisition , and we hold a portfolio of mineral exploration properties and assets for future sale , joint venture or to create a royalty up to the development stage of the project ( development activities include , among other things , completion of a feasibility study for the identification of proven and probable reserves , as well as permitting and preparing a deposit for mining ) . at that point , or sometime prior to that point , we would likely attempt to sell a given mineral property , pursue its development either on our own , or through a joint venture with a partner that has expertise in mining operations , or obtain a royalty from a third party that continues to advance the property . although our mineral properties may be developed in the future by us , through a joint venture or by a third party , we have never developed a mineral property . in addition to focusing on its mineral exploration properties and the evaluation of mineral properties for acquisition , solitario also evaluates potential strategic corporate transactions as a means to acquire and interest in new precious and base metal properties and assets with exploration potential as well as other potential corporate transactions and combinations determined to be favorable to solitario . our geographic focus for the evaluation of potential mineral property assets is in north and south america ; however , we have conducted property evaluations for potential acquisition in other parts of the world . at december 31 , 2019 , we consider our carried interest in our florida canyon project in peru and our interest in the lik project in alaska to be our core mineral property assets . in addition , at december 31 , 2019 , we have one exploration property in peru . we are conducting independent exploration activities in peru and through joint ventures operated by our partners in peru and the united states . we conduct potential acquisition evaluations in other countries of both south and north america . as of december 31 , 2019 , we have significant balances of cash and short-term investments that we anticipate using , in part , to fund planned 2020 exploration , to further the exploration of our lik project , conduct exploration on the la promesa project in peru , and to potentially acquire additional mineral property assets . the fluctuations in commodity prices of base and precious metals has contributed to a challenging environment for mineral exploration and development , which has created opportunities as well as challenges for the potential acquisition of advanced mineral exploration projects or other related assets at potentially attractive terms . in analyzing our activities , the most significant aspect relates to results of our exploration and potential development activities and those of our joint venture partners on a property-by-property basis . when our exploration or potential development activities , including drilling , sampling and geologic testing , indicate a project may not be economic or contain sufficient geologic or economic potential we may impair or completely write-off the property . another significant factor in the success or failure of our activities is the price of commodities . for example , when the price of zinc is down , the value of zinc-bearing mineral properties decreases ; however , when the price of zinc is up it may become more difficult and expensive to locate and acquire new zinc-bearing mineral properties with potential to have economic deposits . 28 the potential sale , joint venture or development of our mineral properties will occur , if at all , on an infrequent basis . historically , we have recorded revenues and met our need for capital in the past through ( i ) the sale of properties and assets ; ( ii ) joint venture payments , including delay rental payments ; ( iii ) a royalty sale on our former mt . hamilton property ; ( iv ) the sale of our shares of vendetta and kinross common stock ; ( v ) long-term debt secured by our mineral property ; ( vi ) short-term margin borrowing ; and ( vii ) issuances of common stock . during 2019 we recorded mineral property income of $ 408,000 from the royalty sale , discussed above . during 2018 we recorded mineral property income from the sale of our yanacocha royalty of $ 502,000. in 2015 we recorded a gain on the sale of our interest in mount hamilton llc of $ 12,309,000. during june 2012 , we sold a royalty interest in our mt . hamilton project to sandstorm gold ltd. for $ 10,000,000. previous to the sale of our interest in mt . hamilton llc , our last significant cash proceeds from a property or asset sale were recorded in 2000 upon the sale of our former yanacocha property for $ 6,000,000. proceeds from the sale or joint venture of properties , although significant when they occur , have not been a consistent annual source of cash and would occur in the future , if at all , on an infrequent basis . we have reduced our exposure to the costs of our exploration activities in the past through the use of joint ventures . although we anticipate the use of joint venture funding for some of our exploration activities will continue for the foreseeable future , we can provide no assurance that these or other sources of capital will be available in sufficient amounts to meet our needs , if at all . ( c ) . story_separator_special_tag our net 2019 mineral and surface property rental and option payments , included in exploration expense , were $ 13,000. our 2020 total exploration property rentals and option payments for properties we own , have under joint venture , or operate are estimated to be approximately $ 859,000. assuming that our joint ventures continue in their current status and that we do not appreciably change our property positions on existing properties , we estimate that our joint venture partners will pay on our behalf or reimburse us approximately $ 816,000 of these annual payments . these obligations are detailed below under “ contractual obligations . ” in addition , we may be required to make further payments in the future if we elect to exercise our options under those agreements or if we enter into new agreements . 32 environmental compliance we are subject to various federal , state and local environmental laws and regulations in the countries where we operate . we are required to obtain permits in advance of initiating certain of our exploration activities , to monitor and report on certain activities to appropriate authorities , and to perform remediation of environmental disturbance as a result of certain of our activities . historically , the nature of our activities of review , acquisition and exploration of properties prior to the establishment of reserves , which may include mapping , sampling , geochemistry and geophysical studies , as well as some limited exploration drilling , has not resulted in significant environmental impacts in the past . we have historically carried on our required environmental remediation expenditures and activities , if any , concurrently with our exploration activities and expenditures . the expenditures to comply with our environmental obligations are included in our exploration expenditures in the statement of operations and have not been material to our capital or exploration expenditures and have not had a material effect on our financial position . for the years ended december 31 , 2019 and 2018 , we have not capitalized any costs related to environmental control facilities . we do not anticipate our exploration activities will result in any material new or additional environmental expenditures or liabilities in the near future . contractual obligations the following table provides an analysis of our contractual obligations : replace_table_token_11_th ( 1 ) lease obligation on our wheat ridge colorado office . ( 3 ) mineral property payments under lease and property claim and concession payments for the next year , net of joint venture payments . ( g ) . exploration joint ventures , royalty and other properties the following discussion relates to an analysis of our anticipated property exploration plans as of december 31 , 2019. please also see note 2 , “ mineral properties , ” to the consolidated financial statements in item 8 , “ financial statements and supplementary data , ” and our discussion of our properties under item 2 , “ properties ” of this annual report on form 10-k for a more complete discussion of all of our mineral properties . florida canyon the florida canyon project is an advanced-stage high-grade zinc project in peru . based on extensive exploration and development work conducted to date , we believe the property has potential to be developed into a mine over the next several years . the project is held in a joint venture between nexa ( 61 % ) and solitario ( 39 % ) . solitario and nexa jointly completed a pea in 2017 that incorporated a variety of nexa-generated prefeasibility studies into the analysis . the pea evaluation included resource estimation , mining and processing recovery estimates , a preliminary mining and processing plan , infrastructure layout , environmental considerations and an economic analysis based on certain base case parameters . the pea envisioned an underground mining operation with a 2,500 tonne per day floatation mill for processing , resulting in a 12.5-year mine life . concentrates would be trucked to nexa 's cajamarquilla zinc smelter facility in lima , peru . the terrain at florida canyon is steep and previous project access supporting surface and underground work programs was conducted by helicopter . the lack of road access restricted the scope of field activities to further advance the project . during 2019 limited work was undertaken on road access to the project , and nexa expects to continue to work on completing the road access during 2020. during 2019 , nexa completed the drilling program and several significant drill intercepts were encountered . solitario reported the results of the drill intercepts during 2019. nexa is evaluating the results of the drilling program and solitario anticipates nexa will continue the exploration of florida canyon during 2020. should nexa complete the road , heavy equipment will be able to enter the project area and allow feasibility related activities to proceed more efficiently . important future activities that may be facilitated by the completion of the road are the construction of an underground tunnel into the karen-milagros high-grade zinc zone , detailed underground resource/reserve definition drilling , surface drilling designed to increase the project resources and additional feasibility-related studies . solitario 's payments of $ 1,580,000 related to the drilling program are in the form of an advance on solitario 's commitment to fund 30 % of any future development of florida canyon under the original joint venture agreement between solitario and nexa . accordingly , in the event florida canyon is developed , which can not be assured at this time , the funds paid to nexa related to the drilling program , will reduce the amount of solitario 's obligation to fund 30 % of future development costs , and / or repay any loans from nexa for future development costs at florida canyon . 33 lik project the lik project is an advanced-staged high-grade zinc project . the project is held in a joint venture between teck ( 50 % ) and solitario ( 50

