Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	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