Segment and Related Information - Schedule of information of the company's segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Information as to the Company's segments [Abstract]
Revenues	$ 232,605	$ 229,653
Operating (loss) income	(121)	2,213
Other income, net	629	1,316
Interest (expense) income, net	(121)	121
Income from continuing operations before provision for income taxes	387	3,650
Identifiable assets	114,624	124,049
Goodwill	11,051	11,051
Depreciation, amortization, and accretion	4,033	4,624
Capital expenditures including software costs	8,857	6,118
Other
Information as to the Company's segments [Abstract]
Operating (loss) income	(3,883)	(4,772)
Identifiable assets	31,653	29,873
Depreciation, amortization, and accretion	543	1,107
Capital expenditures including software costs	4,856	2,792
Operating Segments | Restaurant/Retail
Information as to the Company's segments [Abstract]
Revenues	171,593	149,341
Operating (loss) income	(2,761)	825
Identifiable assets	74,257	87,672
Goodwill	10,315	10,315
Depreciation, amortization, and accretion	3,469	3,479
Capital expenditures including software costs	3,994	3,285
Operating Segments | Government
Information as to the Company's segments [Abstract]
Revenues	61,012	80,312
Operating (loss) income	6,523	6,160
Identifiable assets	8,714	6,504
Goodwill	736	736
Depreciation, amortization, and accretion	21	38
Capital expenditures including software costs	$ 7	$ 41