Accounts Receivable, Net - Schedule of Accounts Receivable, Net (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2018
Accounts Receivable [Abstract]
Accounts receivable - net	$ (40,106)	$ (41,774)
Government
Accounts Receivable [Abstract]
Accounts receivable - net	(7,860)	(11,000)
Restaurant/Retail
Accounts Receivable [Abstract]
Accounts receivable - net	(32,246)	(30,774)
Allowance for doubtful accounts	1,880	1,849	$ 2,005	$ 1,351
Billed | Government
Accounts Receivable [Abstract]
Accounts receivable - net	(8,460)	(11,608)
Advanced billings | Government
Accounts Receivable [Abstract]
Accounts receivable - net	$ (600)	$ (608)