Revenue (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($) Obligation	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) Stream Obligation	Sep. 30, 2019 USD ($)
Disaggregation of Revenue [Abstract]
Revenue	$ 12,922	$ 20,031	$ 44,967	$ 65,683
Number of distinct revenue streams | Stream			3
Contract with Customer, Asset and Liability [Abstract]
Revenue recognized in the period from amounts included in Billings-in-Excess of Revenue Earned at the beginning of the period	$ 1,520	762	$ 6,221	8,615
Revenue, Performance Obligation [Abstract]
Number of performance obligations | Obligation	2		2
Performance Segment [Member]
Disaggregation of Revenue [Abstract]
Revenue	$ 7,257	11,417	$ 25,240	36,617
Performance Segment [Member] | SDB [Member]
Disaggregation of Revenue [Abstract]
Revenue	2,473	4,435	9,535	16,472
Performance Segment [Member] | Software [Member]
Disaggregation of Revenue [Abstract]
Revenue	942	786	2,575	2,170
Performance Segment [Member] | Training and Consulting [Member]
Disaggregation of Revenue [Abstract]
Revenue	3,842	6,196	13,130	17,975
NITC Segment [Member]
Disaggregation of Revenue [Abstract]
Revenue	5,665	8,614	19,727	29,066
NITC Segment [Member] | Training and Consulting [Member]
Disaggregation of Revenue [Abstract]
Revenue	$ 5,665	$ 8,614	$ 19,727	$ 29,066