SEGMENTS The Company determines its operating segments based on ASC 280, Segment Reporting , how the chief operating decision making group monitors and manages the performance of the business and the level at which financial information is reviewed. The Companys operating segments are strategic business units that offer different products and services. The Company's core business is delivering seamlessly integrated payment and software solutions to SMBs and organizations in strategic vertical markets. This is accomplished through the Merchant Services and Proprietary Software and Payments segments. The Merchant Services segment provides comprehensive payment solutions to businesses and organizations. The Merchant Services segment includes third-party integrated payment solutions as well as traditional payment services across the Company's strategic vertical markets. The Proprietary Software and Payments segment delivers embedded payment solutions to the Company's clients through company-owned software. Payments are delivered through both the payment facilitator model and the traditional merchant processing model. The Company's Proprietary Software and Payments clients are primarily in the education, property management and public sector markets. The Other category includes corporate overhead expenses when presenting reportable segment information. The Company primarily uses processing margin to measure operating performance. The following is a summary of reportable segment operating performance for the three and six months ended March 31, 2020 and 2019. As of and for the Three Months Ended March 31, 2020 Merchant Services Proprietary Software and Payments Other Total Revenue $ 25,018 $ 14,691 $ (531) $ 39,178 Operating expenses Other costs of services 11,297 1,188 (530) 11,955 Selling general and administrative 6,469 7,717 6,600 20,786 Depreciation and amortization 2,861 1,498 179 4,538 Change in fair value of contingent consideration (400) 258  (142) Income (loss) from operations $ 4,791 $ 4,030 $ (6,780) $ 2,041 Processing margin (1) $ 19,245 $ 13,675 $ (527) $ 32,393 Total assets $ 200,159 $ 109,689 $ 41,334 $ 351,182 Goodwill $ 107,539 $ 59,515 $  $ 167,054 __________________________ 1. Processing margin is equal to revenue less interchange and network fees, less other costs of services. $5,524, $172 and $(526) of residual expense, a component of other costs of services, are added back to the Merchant Services segment, Proprietary Software and Payments segment, and Other category, respectively. As of and for the Six Months Ended March 31, 2020 Merchant Services Proprietary Software and Payments Other Total Revenue $ 52,483 $ 28,747 $ (941) $ 80,289 Operating expenses Other costs of services 23,410 2,403 (940) 24,873 Selling general and administrative 12,791 15,653 11,629 40,073 Depreciation and amortization 5,808 3,037 348 9,193 Change in fair value of contingent consideration (1,606) 1,618  12 Income (loss) from operations $ 12,080 $ 6,036 $ (11,978) $ 6,138 Processing margin (1) $ 40,141 $ 26,684 $ (935) $ 65,890 Total assets $ 200,159 $ 109,689 $ 41,334 $ 351,182 Goodwill $ 107,539 $ 59,515 $  $ 167,054 __________________________ 1. Processing margin is equal to revenue less interchange and network fees, less other costs of services. $11,068, $340 and $(934) of residual expense, a component of other costs of services, are added back to the Merchant Services segment, Proprietary Software and Payments segment, and Other category, respectively. As of and for the Three Months Ended March 31, 2019 Merchant Services Proprietary Software and Payments Other Total Revenue $ 76,875 $ 8,519 $  $ 85,394 Operating expenses Interchange and network fees 53,121 1,564  54,685 Other costs of services 9,725 468  10,193 Selling general and administrative 6,226 3,675 4,418 14,319 Depreciation and amortization 2,917 842 139 3,898 Change in fair value of contingent consideration (390) 2,892  2,502 Income (loss) from operations $ 5,276 $ (922) $ (4,557) $ (203) Processing margin (1) $ 17,584 $ 6,675 $  $ 24,259 Total assets $ 152,851 $ 59,077 $ 6,571 $ 218,499 Goodwill $ 71,950 $ 32,701 $  $ 104,651 __________________________ 1. Processing margin is equal to revenue less interchange and network fees, less other costs of services. $3,555, $188 and $0 of residual expense, a component of other costs of services, are added back to the Merchant Services segment, Proprietary Software and Payments segment, and Other category, respectively. As of and for the Six Months Ended March 31, 2019 Merchant Services Proprietary Software and Payments Other Total Revenue $ 154,577 $ 15,685 $  $ 170,262 Operating expenses Interchange and network fees 107,485 3,029  110,514 Other costs of services 19,121 862  19,983 Selling general and administrative 12,317 6,662 7,856 26,835 Depreciation and amortization 5,699 1,503 248 7,450 Change in fair value of contingent consideration (709) 2,862  2,153 Income (loss) from operations $ 10,664 $ 767 $ (8,104) $ 3,327 Processing margin (1) $ 35,211 $ 12,136 $  $ 47,347 Total assets $ 152,851 $ 59,077 $ 6,571 $ 218,499 Goodwill $ 71,950 $ 32,701 $  $ 104,651 __________________________ 1. Processing margin is equal to revenue less interchange and network fees, less other costs of services. $7,240, $342 and $0 of residual expense, a component of other costs of services, are added back to the Merchant Services segment, Proprietary Software and Payments segment, and Other category, respectively.