Note 6  Commitment and Contingencies Operating Lease Agreements In July 2016, the Company renewed its lease with an unrelated third party for its headquarters office. The renewal was effective September 1, 2016 and expanded the office space being occupied. The lease expires in September 2022 and lease payments increase by 3% annually. Future minimum lease payments as of December 31, 2017 are as follows: Year Minimum Lease Payment 2018 190,000 2019 196,000 2020 202,000 2021 208,000 2022 160,000 Total $ 956,000 Rental expense for year ended December 31, 2017 and 2016 was approximately $178,000 and $100,000, respectively. Manufacturing Agreement In July 2010, the Company entered into a three-year contract manufacturing agreement with an unrelated third party for the production and manufacture of the Companys main product in accordance with the Companys product specifications. The agreement renews for successive years unless either party notifies the other party in writing, at least 60 days prior to the anniversary date of this agreement that it will not renew the agreement. The Company or the manufacturer has the option to terminate the agreement with 90 days written notice. Any change in the relationship with the manufacturer could have an adverse effect on the Companys business. Purchases from this manufacturer totaled approximately $3,838,000 and $3,917,000 for the years ended December 31, 2017 and 2016, respectively. As of December 31, 2017, and 2016 approximately $829,000 and $563,000, respectively, was due to this manufacturer, which is presented in accounts payable and accrued expenses in the accompanying balance sheets. Legal contingencies The Company is party to certain legal proceedings in the ordinary course of business. The Company assesses, in conjunction with its legal counsel, the need to record a liability for litigation and related contingencies.