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Segment reporting and concentrations (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Segment reporting information
Revenues	$ 21,192	$ 15,967
Income (loss) before provision for income taxes	(2,415)	336
Total assets	54,934		$ 59,217
Goodwill	2,142		2,143
Before Intersegment Eliminations [Member]
Segment reporting information
Income (loss) before provision for income taxes	(2,415)	336
After Intersegment Eliminations [Member]
Segment reporting information
Income (loss) before provision for income taxes	(2,415)	336
DDS [Member]
Segment reporting information
Revenues	15,911	11,764
Total assets	34,255		40,100
DDS [Member] | Before Intersegment Eliminations [Member]
Segment reporting information
Income (loss) before provision for income taxes	1,253	654
DDS [Member] | After Intersegment Eliminations [Member]
Segment reporting information
Income (loss) before provision for income taxes	1,096	584
Synodex [Member]
Segment reporting information
Revenues	1,669	1,018
Total assets	2,346		1,753
Synodex [Member] | Before Intersegment Eliminations [Member]
Segment reporting information
Income (loss) before provision for income taxes	(988)	108
Synodex [Member] | After Intersegment Eliminations [Member]
Segment reporting information
Income (loss) before provision for income taxes	(859)	152
Agility [Member]
Segment reporting information
Revenues	3,612	3,185
Total assets	18,333		17,364
Goodwill	2,142		$ 2,143
Agility [Member] | Before Intersegment Eliminations [Member]
Segment reporting information
Income (loss) before provision for income taxes	(2,680)	(426)
Agility [Member] | After Intersegment Eliminations [Member]
Segment reporting information
Income (loss) before provision for income taxes	$ (2,652)	$ (400)

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