Segment and Related Information (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($) h segment	Jun. 30, 2017 USD ($)
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	$ 52,571	$ 62,261	$ 108,232	$ 128,126
Operating (loss) income	(1,124)	2,754	(986)	4,995
Other (expense) income, net	(384)	54	(335)	(194)
Interest expense, net	(78)	(13)	(119)	(45)
(Loss) income from continuing operations before provision for income taxes	(1,586)	2,795	(1,440)	4,756
Depreciation, amortization and accretion	1,217	954	2,279	1,852
Capital expenditures including software costs	2,165	2,296	3,835	5,645
Operating segments | Restaurant/Retail
Information as to the Company's segments [Abstract]
Revenues	34,827	47,716	74,347	99,265
Operating (loss) income	(2,800)	1,795	(3,408)	4,161
Depreciation, amortization and accretion	1,057	821	1,965	1,595
Capital expenditures including software costs	1,126	1,256	2,265	2,331
Operating segments | Government
Information as to the Company's segments [Abstract]
Revenues	17,744	14,545	33,885	28,861
Operating (loss) income	2,012	1,587	3,278	3,098
Depreciation, amortization and accretion	6	4	11	11
Capital expenditures including software costs	37	7	37	7
Other
Information as to the Company's segments [Abstract]
Operating (loss) income	(336)	(628)	(856)	(2,264)
Depreciation, amortization and accretion	154	129	303	246
Capital expenditures including software costs	1,002	1,033	1,533	3,307
Reportable geographical components | United States
Information as to the Company's segments [Abstract]
Revenues	48,845	57,621	101,523	119,188
Reportable geographical components | Other Countries
Information as to the Company's segments [Abstract]
Revenues	$ 3,726	$ 4,640	$ 6,709	$ 8,938