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Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Disaggregation of Revenue [Line Items] |  |  |
Revenue | $ 415,823 | $ 355,795 | $ 282,876
Hardware |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue | 103,391 | 114,410 | 105,014
Subscription service |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue | 122,597 | 97,499 | 62,649
Professional service |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue | 50,726 | 50,438 | 42,688
Restaurant/Retail | Point in Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue | 124,956 | 135,347 | 123,180
Restaurant/Retail | Over Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue | 151,758 | 127,000 | 87,171
Restaurant/Retail | Hardware | Point in Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue | 103,391 | 114,410 | 105,014
Restaurant/Retail | Hardware | Over Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue | 0 | 0 | 0
Restaurant/Retail | Subscription service | Point in Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue | 0 | 0 | 0
Restaurant/Retail | Subscription service | Over Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue | 122,597 | 97,499 | 62,649
Restaurant/Retail | Professional service | Point in Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue | 21,565 | 20,937 | 18,166
Restaurant/Retail | Professional service | Over Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue | 29,161 | 29,501 | 24,522
Restaurant/Retail | Mission systems | Point in Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue | 0 | 0 | 0
Restaurant/Retail | Mission systems | Over Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue | 0 | 0 | 0
Restaurant/Retail | Intelligence, surveillance, and reconnaissance solutions | Point in Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue | 0 | 0 | 0
Restaurant/Retail | Intelligence, surveillance, and reconnaissance solutions | Over Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue | 0 | 0 | 0
Restaurant/Retail | Commercial software | Point in Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue | 0 | 0 | 0
Restaurant/Retail | Commercial software | Over Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue | 0 | 0 | 0
Government | Point in Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue | 710 | 1,132 | 505
Government | Over Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue | 138,399 | 92,316 | 72,020
Government | Hardware | Point in Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue | 0 | 0 | 0
Government | Hardware | Over Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue | 0 | 0 | 0
Government | Subscription service | Point in Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue | 0 | 0 | 0
Government | Subscription service | Over Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue | 0 | 0 | 0
Government | Professional service | Point in Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue | 0 | 0 | 0
Government | Professional service | Over Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue | 0 | 0 | 0
Government | Mission systems | Point in Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue | 0 | 0 | 0
Government | Mission systems | Over Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue | 35,583 | 35,458 | 38,311
Government | Intelligence, surveillance, and reconnaissance solutions | Point in Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue | 0 | 0 | 0
Government | Intelligence, surveillance, and reconnaissance solutions | Over Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue | 102,153 | 56,141 | 33,188
Government | Commercial software | Point in Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue | 710 | 1,132 | 505
Government | Commercial software | Over Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue | $ 663 | $ 717 | $ 521

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