Revenue Recognition - Schedule of Disaggregated Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Disaggregation of Revenue [Line Items]
Revenue	$ 80,285	$ 54,467
Service
Disaggregation of Revenue [Line Items]
Revenue	33,773	18,028
Product
Disaggregation of Revenue [Line Items]
Revenue	25,073	18,556
Restaurant/Retail
Disaggregation of Revenue [Line Items]
Revenue	58,846	36,584
Government
Disaggregation of Revenue [Line Items]
Revenue	21,439	17,883
Point in Time | Restaurant/Retail
Disaggregation of Revenue [Line Items]
Revenue	30,207	21,490
Point in Time | Restaurant/Retail | Hardware
Disaggregation of Revenue [Line Items]
Revenue	24,653	17,835
Point in Time | Restaurant/Retail | Software
Disaggregation of Revenue [Line Items]
Revenue	34	243
Point in Time | Restaurant/Retail | Service
Disaggregation of Revenue [Line Items]
Revenue	5,520	3,412
Point in Time | Restaurant/Retail | Mission systems
Disaggregation of Revenue [Line Items]
Revenue	0	0
Point in Time | Restaurant/Retail | Intelligence, surveillance, and reconnaissance solutions
Disaggregation of Revenue [Line Items]
Revenue	0	0
Point in Time | Restaurant/Retail | Product
Disaggregation of Revenue [Line Items]
Revenue	0	0
Over Time | Restaurant/Retail
Disaggregation of Revenue [Line Items]
Revenue	28,639	15,094
Over Time | Restaurant/Retail | Hardware
Disaggregation of Revenue [Line Items]
Revenue	0	0
Over Time | Restaurant/Retail | Software
Disaggregation of Revenue [Line Items]
Revenue	19,313	7,633
Over Time | Restaurant/Retail | Service
Disaggregation of Revenue [Line Items]
Revenue	9,326	7,461
Over Time | Restaurant/Retail | Mission systems
Disaggregation of Revenue [Line Items]
Revenue	0	0
Over Time | Restaurant/Retail | Intelligence, surveillance, and reconnaissance solutions
Disaggregation of Revenue [Line Items]
Revenue	0	0
Over Time | Restaurant/Retail | Product
Disaggregation of Revenue [Line Items]
Revenue	0	0
Over Time | Government
Disaggregation of Revenue [Line Items]
Revenue	21,439	17,883
Over Time | Government | Hardware
Disaggregation of Revenue [Line Items]
Revenue	0	0
Over Time | Government | Software
Disaggregation of Revenue [Line Items]
Revenue	0	0
Over Time | Government | Service
Disaggregation of Revenue [Line Items]
Revenue	0	0
Over Time | Government | Mission systems
Disaggregation of Revenue [Line Items]
Revenue	8,915	9,547
Over Time | Government | Intelligence, surveillance, and reconnaissance solutions
Disaggregation of Revenue [Line Items]
Revenue	12,290	8,131
Over Time | Government | Product
Disaggregation of Revenue [Line Items]
Revenue	$ 234	$ 205