Segment and Related Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) Segment h	Sep. 30, 2016 USD ($)
Segment and Related Information [Abstract]
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	$ 48,938	$ 61,492	$ 177,064	$ 169,455
Operating (loss) income:	(2,596)	821	2,399	1,238
Other expense, net	(70)	(38)	(264)	(318)
Interest (expense) income, net	(39)	(12)	(84)	20
(Loss) income from continuing operations before provision for income taxes	(2,705)	771	2,051	940
Depreciation, amortization and accretion	953	1,611	2,805	3,214
Capital expenditures including software costs	1,578	1,515	7,223	3,719
Other [Member]
Information as to the Company's segments [Abstract]
Operating (loss) income:	(304)	(1,687)	(2,568)	(3,273)
Depreciation, amortization and accretion	62	861	308	957
Capital expenditures including software costs	457	681	3,764	1,196
Reportable Segments [Member] | Restaurant/Retail Segment [Member]
Information as to the Company's segments [Abstract]
Revenues	34,023	38,377	133,288	105,413
Operating (loss) income:	(3,559)	1,091	603	(209)
Depreciation, amortization and accretion	886	740	2,481	2,228
Capital expenditures including software costs	1,121	787	3,452	2,437
Reportable Segments [Member] | Government [Member]
Information as to the Company's segments [Abstract]
Revenues	14,915	23,115	43,776	64,042
Operating (loss) income:	1,267	1,417	4,364	4,720
Depreciation, amortization and accretion	5	10	16	29
Capital expenditures including software costs	0	47	7	86
Reportable Geographical Components [Member] | United States [Member]
Information as to the Company's segments [Abstract]
Revenues	44,418	58,092	163,606	155,882
Reportable Geographical Components [Member] | Other Countries [Member]
Information as to the Company's segments [Abstract]
Revenues	$ 4,520	$ 3,400	$ 13,458	$ 13,573