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Revenue, Segment and Geographic Information - Schedule of (Loss) Income from Operations by Reporting Segments (Details) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items] |  |  |  |
Revenue | $ 12,976,058 | $ 14,938,964 | $ 37,961,023 | $ 39,883,099
Cost of revenues | (8,074,445) | (9,909,045) | (26,338,527) | (27,028,399)
Gross profit | $ 4,901,613 | $ 5,029,919 | $ 11,622,496 | $ 12,854,700
Gross margin % | 37.80% | 33.70% | 30.60% | 32.20%
Total operating expenses | $ 3,922,171 | $ 4,610,362 | $ 12,560,094 | $ 15,447,831
Income (loss) from operations | 979,442 | 419,557 | (937,598) | (2,593,131)
OSS Segment |  |  |  |
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items] |  |  |  |
Revenue | 8,976,539 | 9,735,630 | 24,722,066 | 26,167,536
Cost of revenues | (4,976,063) | (5,937,592) | (15,899,150) | (16,442,130)
Gross profit | $ 4,000,476 | $ 3,798,038 | $ 8,822,916 | $ 9,725,406
Gross margin % | 44.60% | 39.00% | 35.70% | 37.20%
Total operating expenses | $ 3,052,949 | $ 3,730,788 | $ 9,883,997 | $ 12,703,649
Income (loss) from operations | 947,527 | 67,250 | (1,061,081) | (2,978,243)
Bressner Segment |  |  |  |
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items] |  |  |  |
Revenue | 3,999,519 | 5,203,334 | 13,238,957 | 13,715,563
Cost of revenues | (3,098,382) | (3,971,453) | (10,439,377) | (10,586,269)
Gross profit | $ 901,137 | $ 1,231,881 | $ 2,799,580 | $ 3,129,294
Gross margin % | 22.50% | 23.70% | 21.10% | 22.80%
Total operating expenses | $ 869,222 | $ 879,574 | $ 2,676,097 | $ 2,744,182
Income (loss) from operations | $ 31,915 | $ 352,307 | $ 123,483 | $ 385,112

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