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Revenue Recognition - Schedule of Disaggregated Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 68,950 | $ 45,691 | $ 123,417 | $ 100,423
Service |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 27,185 | 15,300 | 45,213 | 34,075
Product |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 23,939 | 12,333 | 42,495 | 30,967
Restaurant/Retail |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 51,124 | 27,633 | 87,708 | 65,042
Government |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 17,826 | 18,058 | 35,709 | 35,381
Point in Time | Restaurant/Retail |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 29,111 | 14,898 | 50,601 | 38,539
Point in Time | Restaurant/Retail | Hardware |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 23,355 | 12,104 | 41,190 | 30,241
Point in Time | Restaurant/Retail | Software |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 294 | 624 | 537 | 1,186
Point in Time | Restaurant/Retail | Service |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 5,462 | 2,170 | 8,874 | 7,112
Point in Time | Restaurant/Retail | Mission Systems |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 0 | 0 | 0 | 0
Point in Time | Restaurant/Retail | ISR Solutions |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 0 | 0 | 0 | 0
Point in Time | Restaurant/Retail | Product |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 0 | 0 | 0 |
Over Time | Restaurant/Retail |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 22,013 | 12,735 | 37,107 | 26,503
Over Time | Restaurant/Retail | Hardware |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 0 | 0 | 0 | 0
Over Time | Restaurant/Retail | Software |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 14,806 | 7,232 | 22,439 | 14,618
Over Time | Restaurant/Retail | Service |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 7,207 | 5,503 | 14,668 | 11,885
Over Time | Restaurant/Retail | Mission Systems |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 0 | 0 | 0 | 0
Over Time | Restaurant/Retail | ISR Solutions |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 0 | 0 | 0 | 0
Over Time | Restaurant/Retail | Product |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 0 | 0 | 0 |
Over Time | Government |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 17,826 | 18,058 | 35,709 | 35,381
Over Time | Government | Hardware |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 0 | 0 | 0 | 0
Over Time | Government | Software |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 0 | 0 | 0 | 0
Over Time | Government | Service |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 0 | 0 | 0 | 0
Over Time | Government | Mission Systems |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 9,284 | 8,087 | 18,831 | 16,535
Over Time | Government | ISR Solutions |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 8,338 | 9,742 | 16,469 | 18,514
Over Time | Government | Product |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 204 | $ 229 | $ 409 | $ 332

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