Segment and Related Information - Schedule of information of the company's segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Total net revenues	$ 187,232	$ 201,246
Operating (loss) income	(13,131)	(9,898)
Other income, net	(1,503)	306
Interest expense, net	(4,571)	(387)
Loss before provision for income taxes	(19,205)	(9,979)
Identifiable assets	189,612	94,681
Goodwill	41,386	11,051
Depreciation, amortization, and accretion	7,255	4,730
Capital expenditures including software costs	6,530	7,840
Restaurant/Retail
Segment Reporting Information [Line Items]
Goodwill	40,650	10,315
Government
Segment Reporting Information [Line Items]
Goodwill	736	736
Operating Segments | Restaurant/Retail
Segment Reporting Information [Line Items]
Total net revenues	123,307	134,069
Operating (loss) income	(17,427)	(14,399)
Identifiable assets	136,308	68,004
Depreciation, amortization, and accretion	3,858	4,109
Capital expenditures including software costs	4,394	4,307
Operating Segments | Government
Segment Reporting Information [Line Items]
Total net revenues	63,925	67,177
Operating (loss) income	5,463	6,886
Identifiable assets	13,454	9,867
Depreciation, amortization, and accretion	67	32
Capital expenditures including software costs	258	124
Other
Segment Reporting Information [Line Items]
Operating (loss) income	(1,167)	(2,385)
Identifiable assets	39,850	16,810
Depreciation, amortization, and accretion	3,330	589
Capital expenditures including software costs	$ 1,878	$ 3,409