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Segment Reporting and Concentrations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018	Dec. 31, 2017
Segment reporting information
Revenues	$ 13,846	$ 14,049	$ 41,179	$ 42,439
Income (loss) before provision for income taxes	(137)	1,162	(1,177)	1,457
Total assets	52,152		52,152		$ 46,051
Goodwill	2,062	2,122	2,062	2,122	2,050	$ 2,832
Before Intersegment Eliminations [Member]
Segment reporting information
Income (loss) before provision for income taxes	(137)	1,162	(1,177)	1,457
After Intersegment Eliminations [Member]
Segment reporting information
Income (loss) before provision for income taxes	(137)	1,162	(1,177)	1,457
DDS [Member]
Segment reporting information
Revenues	10,124	10,756	30,353	32,059
Total assets	29,186		29,186		22,334
DDS [Member] \| Before Intersegment Eliminations [Member]
Segment reporting information
Income (loss) before provision for income taxes	376	1,731	603	2,843
DDS [Member] \| After Intersegment Eliminations [Member]
Segment reporting information
Income (loss) before provision for income taxes	309	1,673	415	2,663
Synodex [Member]
Segment reporting information
Revenues	977	1,013	2,916	3,008
Total assets	752		752		787
Synodex [Member] \| Before Intersegment Eliminations [Member]
Segment reporting information
Income (loss) before provision for income taxes	(70)	91	(81)	144
Synodex [Member] \| After Intersegment Eliminations [Member]
Segment reporting information
Income (loss) before provision for income taxes	(26)	132	42	266
Agility [Member]
Segment reporting information
Revenues	2,745	2,280	7,910	7,372
Total assets	22,214		22,214		22,930
Goodwill	2,062		2,062		$ 2,050
Agility [Member] \| Before Intersegment Eliminations [Member]
Segment reporting information
Income (loss) before provision for income taxes	(443)	(660)	(1,699)	(1,530)
Agility [Member] \| After Intersegment Eliminations [Member]
Segment reporting information
Income (loss) before provision for income taxes	$ (420)	$ (643)	$ (1,634)	$ (1,472)