Accounts Receivable, Net - Schedule of Accounts Receivable, Net (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Accounts Receivable [Abstract]
Accounts receivable – net	$ 48,902	$ 42,980
Government
Accounts Receivable [Abstract]
Accounts receivable – net	10,919	10,277
Restaurant/Retail
Accounts Receivable [Abstract]
Accounts receivable – net	37,983	32,703
Billed | Government
Accounts Receivable [Abstract]
Accounts receivable – net	10,919	11,225
Advanced billings | Government
Accounts Receivable [Abstract]
Accounts receivable – net	$ 0	$ (948)