Segment and Related Information (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2017 USD ($) Segment Unit h	Jun. 30, 2016 USD ($)
Segment and Related Information [Abstract]
Number of reporting units | Unit			2
Number of reportable segments | Segment			2
Number of hours of telephone support for restaurant and retail segment | h			24
Information as to the Company's segments [Abstract]
Revenues	$ 62,261	$ 52,658	$ 128,126	$ 107,963
Operating (loss) income	2,754	352	4,995	416
Other income (loss), net	54	(210)	(194)	(280)
Interest (expense) income, net	(13)	3	(45)	32
Income from continuing operations before provision for income taxes	2,795	145	4,756	168
Depreciation, amortization and accretion	954	829	1,852	1,606
Capital expenditures including software costs	2,296	1,223	5,645	2,204
Other [Member]
Information as to the Company's segments [Abstract]
Operating (loss) income	(628)	(344)	(2,264)	(1,587)
Depreciation, amortization and accretion	129	63	246	99
Capital expenditures including software costs	1,033	489	3,307	515
Reportable Segments [Member] | Restaurant/Retail Segment [Member]
Information as to the Company's segments [Abstract]
Revenues	47,716	33,248	99,265	67,036
Operating (loss) income	1,795	(800)	4,161	(1,300)
Depreciation, amortization and accretion	821	756	1,595	1,488
Capital expenditures including software costs	1,256	702	2,331	1,650
Reportable Segments [Member] | Government [Member]
Information as to the Company's segments [Abstract]
Revenues	14,545	19,410	28,861	40,927
Operating (loss) income	1,587	1,496	3,098	3,303
Depreciation, amortization and accretion	4	10	11	19
Capital expenditures including software costs	7	32	7	39
Reportable Geographical Components [Member] | United States [Member]
Information as to the Company's segments [Abstract]
Revenues	57,621	47,571	119,188	97,790
Reportable Geographical Components [Member] | Other Countries [Member]
Information as to the Company's segments [Abstract]
Revenues	$ 4,640	$ 5,087	$ 8,938	$ 10,173