Segment and Related Information - Information of the Company's Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 18, 2019
Segment Reporting Information [Line Items]
Revenue	$ 213,786	$ 187,232	$ 201,246
Operating income (loss)	(23,946)	(14,185)	(10,275)
Other income (expense) – net	808	(449)	683
Loss on extinguishment of debt	(8,123)	0	0
Interest expense – net	(8,287)	(4,571)	(387)
Loss before benefit from (provision for) income taxes	(39,548)	(19,205)	(9,979)
Identifiable assets	343,749	189,612	94,681
Goodwill	41,214	41,386	11,051	$ 30,163
Depreciation, amortization, and accretion	14,452	7,255	4,730
Capital expenditures including software costs	9,231	6,530	7,840
Restaurant/Retail
Segment Reporting Information [Line Items]
Goodwill	40,478	40,650	10,315
Government
Segment Reporting Information [Line Items]
Goodwill	736	736	736
Operating Segments | Restaurant/Retail
Segment Reporting Information [Line Items]
Revenue	142,512	123,307	134,069
Operating income (loss)	(28,089)	(18,481)	(14,776)
Identifiable assets	140,606	136,308	68,004
Depreciation, amortization, and accretion	8,158	3,858	4,109
Capital expenditures including software costs	7,245	4,394	4,307
Operating Segments | Government
Segment Reporting Information [Line Items]
Revenue	71,274	63,925	67,177
Operating income (loss)	5,644	5,463	6,886
Identifiable assets	13,150	13,454	9,867
Depreciation, amortization, and accretion	590	67	32
Capital expenditures including software costs	1,239	258	124
Other
Segment Reporting Information [Line Items]
Operating income (loss)	(1,501)	(1,167)	(2,385)
Identifiable assets	189,993	39,850	16,810
Depreciation, amortization, and accretion	5,704	3,330	589
Capital expenditures including software costs	$ 747	$ 1,878	$ 3,409