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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Segment Reporting - Additional Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) Segment	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Segment Reporting Information [Line Items]
Number of operating segments \| Segment	3
Number of reportable segments \| Segment	3
Carrying value of property and equipment	$ 96,066	$ 70,284
Product Sales
Segment Reporting Information [Line Items]
Revenues	57,700	57,300	$ 32,000
International
Segment Reporting Information [Line Items]
Carrying value of property and equipment	14,800	4,700
Revenues		13,300	$ 14,500
Australia
Segment Reporting Information [Line Items]
Carrying value of property and equipment	6,100
Revenues	13,900
United Kingdom
Segment Reporting Information [Line Items]
Revenues	16,300
Canada
Segment Reporting Information [Line Items]
Carrying value of property and equipment	6,700
Revenues	6,900
Government Solutions \| Equipment Installed at Customer Sites
Segment Reporting Information [Line Items]
Carrying value of property and equipment	61,800	42,400
Government Solutions \| Automobiles
Segment Reporting Information [Line Items]
Carrying value of property and equipment	$ 2,700	$ 1,800