12. Business Segments, Significant Customer and Geographic Information Business Segments We have operated in three reportable segments: Roadway Sensors, Transportation Systems, and Agriculture and Weather Analytics. The Roadway Sensors segment provides various advanced detection sensors and systems for traffic intersection management, communication systems and roadway traffic data collection applications. The Roadways Sensors product line uses advanced image processing technology and other techniques to capture and analyze sensor data through sophisticated algorithms, enabling vehicle, bicycle and pedestrian detection, as well as the transmission of both video images and data using various communication technologies. Our Roadway Sensors products include, among others, Vantage, VantageLive!, Vantage Next (R) , VantagePegasus, VantageRadius, Vantage Vector, Velocity, SmartCycle, SmartCycle Bike Indicator, SmartSpan, VersiCam, PedTrax and P-Series products. In select territories, our Roadway Sensors segment also sells OEM products for the traffic intersection markets, which include, among other things, traffic signal controllers and traffic signal equipment cabinets. The Transportation Systems segment includes engineering and consulting services, managed services, performance measurement and traffic analytics solutions, as well as the development of transportation management and traveler information systems for the ITS industry. Our Transportation Systems services include planning, design, development and implementation of software and hardware-based ITS systems that integrate sensors, video surveillance, computers and advanced communications equipment to enable public agencies to monitor, control and direct traffic flow, assist in the quick dispatch of emergency crews, and distribute real-time information about traffic conditions. Our services include planning, design, implementation, operation and management of surface transportation infrastructure systems. We perform analysis and study goods movement, commercial vehicle operations, provide travel demand forecasting and systems engineering, and identify mitigation measures to reduce traffic congestion. The Transportation Systems segment also includes the operations of AGI beginning July 2, 2019 (see Note 11 of Notes to Consolidated Financial Statements, included in Part II, Item 8 of this report for further details on the acquisition of AGI). The Transportations Systems segment product line includes: Iteris Signal Performance Measures ("SPM"), Iteris ClearGuide, and iPeMS, our performance measurement and analytics solution, our advanced traveler information system solutions ClearPath 511 and Reverse 511, as well as our commercial vehicle operations and vehicle safety compliance platforms known as ClearFleet, CVIEW-Plus, CheckPoint, UCRLink and inspect. The Agriculture and Weather Analytics segment, which we sold in May 2020, consisted of ClearPath Weather, a road maintenance application, and ClearAg, a digital agriculture platform. ClearPath Weather is a web-based solution,which includes a suite of tools that apply data assimilation and modeling technologies to assess historical weather conditions for both short-term and long-range weather forecasts and customizable route/site weather and pavement forecasting, and providing winter road maintenance recommendations for state agencies, municipalities and commercial companies that allow such users to create solutions to meet roadway maintenance decision needs. ClearAg combines weather and agronomic data with proprietary land-surface modeling and analytics to solve complex agricultural problems and to increase the efficiency and sustainability of farmlands. ClearAg solutions are offered to companies in the agriculture industry, such as seed and crop protection companies, integrated food companies, and agricultural equipment manufacturers and service providers. ClearAg provides weather, environment, soil and plant growth modeling to deliver environmental intelligence through ClearAg APIs and components, IMFocus APIs and ClearAg web applications. On May 5, 2020, pursuant to a Purchase Agreement the Company sold the assets of its Agriculture and Weather Analytics segment, composed of its ClearAg and ClearPath Weather product lines, to DTN, an operating company of TBG AG, a Swiss-based holding company. As a result of the sale, we no longer operate in the Agriculture and Weather Analytics segment. See Note 14 for further details on the sale of the Agriculture and Weather Analytics segment. The accounting policies of our reportable segments are the same as those described in the summary of significant accounting policies (Note 1). Certain corporate general and administrative expenses, including general overhead functions such as information systems, accounting, human resources, marketing, compliance costs and certain administrative expenses, as well as interest and amortization of intangible assets, are not allocated to the segments. The reportable segments are each managed separately because they manufacture and distribute distinct products or provide services with different processes. All reported segment revenues are derived from external customers. Our Chief Executive Officer, who is our chief operating decision maker (CODM), reviews financial information at the operating segment level. Our CODM does not review assets by segment in his resource allocation, and therefore, assets by segment are not disclosed below. Selected financial information for our reportable segments for the fiscal years ended March 31, 2020, 2019 and 2018 is as follows: Agriculture Roadway Transportation and Weather Sensors Systems Analytics Total (In thousands) Year Ended March 31, 2020 Product revenues $ 49,082 $ 5,925 $  $ 55,007 Service revenues 288 52,108 6,714 59,110 Total revenues 49,370 58,033 6,714 114,117 Depreciation 200 330 77 607 Segment income (loss) 7,787 10,556 (3,852) 14,491 Year Ended March 31, 2019 Product revenues 43,253 4,974  48,227 Service revenues 239 44,841 5,816 50,896 Total revenues 43,492 49,815 5,816 99,123 Depreciation 233 195 103 531 Segment income (loss) 7,011 5,907 (5,024) 7,894 Year Ended March 31, 2018 Product revenues 44,163 2,301  46,464 Service revenues 194 52,180 4,891 57,265 Total revenues 44,357 54,481 4,891 103,729 Depreciation 221 204 109 534 Segment income (loss) $ 8,825 $ 8,639 $ (8,048) $ 9,416 The following table reconciles total segment income to consolidated operating loss: Year Ended March 31, 2020 2019 2018 (In thousands) Segment income: Total income from reportable segments $ 14,491 $ 7,894 $ 9,416 Unallocated amounts: Corporate expenses (19,710) (15,578) (14,930) Amortization of intangible assets (757) (275) (88) Operating loss $ (5,976) $ (7,959) $ (5,602) $ (5,976) $ (7,959) $ (5,602) Significant Customer and Geographic Information No individual customer or government agency had a receivable balance greater than 10% of our total trade accounts receivable balances as of March 31, 2020 and March 31, 2019. One individual customer who is also a government agency had a receivable balance of 13% of our total trade accounts receivable balance as of March 31, 2018. The following table sets forth the percentages of our revenues, by geographic region, derived from shipments to, or contract, service and other revenues from, external customers located outside the U.S.: Year Ended March 31, 2020 2019 2018 Canada  %  % 1 % Europe  1 1  % 1 % 2 % Substantially all of our long-lived assets are held in the U.S.