Significant Accounting Policies - Additional Information (Details) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2022 USD ($) Customer	Mar. 31, 2022 USD ($)	Jun. 30, 2021 USD ($) Customer	Mar. 31, 2021 USD ($)	Jun. 30, 2022 USD ($) Customer	Jun. 30, 2021 USD ($) Customer	Dec. 31, 2021 USD ($)
Summary Of Significant Accounting Principles And Policies [Line Items]
Net income (loss)	$ 29,641	$ 10,040	$ 3,992	$ (8,915)	$ 39,681	$ (4,923)
Additional paid-in capital	311,252				311,252		$ 309,883
Accumulated deficit	(90,852)				(90,852)		(81,416)
Revenue	187,487		128,657		357,872	218,515
Deferred Revenue, Revenue Recognized					3,700
Product Sales
Summary Of Significant Accounting Principles And Policies [Line Items]
Revenue	12,985		12,231		22,236	12,326
Service Revenue
Summary Of Significant Accounting Principles And Policies [Line Items]
Revenue	174,502		$ 116,426		335,636	$ 206,189
Government Solutions And Parking Solutions Customers
Summary Of Significant Accounting Principles And Policies [Line Items]
Revenue					900
Deferred Revenue	11,000				11,000		8,900
Parking Solutions
Summary Of Significant Accounting Principles And Policies [Line Items]
Deferred Revenue	$ 21,700				$ 21,700		$ 20,900
Customer Concentration Risk | Sales Revenue | Parking Solutions
Summary Of Significant Accounting Principles And Policies [Line Items]
Number of customers exceeds 10% | Customer					0
Customer Concentration Risk | Sales Revenue | Government Solutions
Summary Of Significant Accounting Principles And Policies [Line Items]
Number of customers exceeds 10% | Customer					10
Customer Concentration Risk | Accounts Receivable | City of New York Department of Transportation
Summary Of Significant Accounting Principles And Policies [Line Items]
Concentration risk percentage					25.00%	39.00%
Customer Concentration Risk | Accounts Receivable | Commercial Services
Summary Of Significant Accounting Principles And Policies [Line Items]
Number of customers exceeds 10% | Customer	0		0		0	0
Customer Concentration Risk | Accounts Receivable | Minimum
Summary Of Significant Accounting Principles And Policies [Line Items]
Concentration risk percentage					10.00%