Revenue (Tables)

3 Months Ended

Mar. 31, 2020

Revenue [Abstract]

Disaggregation of Revenue

The following table represents a disaggregation of revenue by type of goods or services for the three months ended March 31, 2020 and 2019, along with the reportable segment for each category:

(in thousands)

	Three months ended
	March 31, 2020		2019
Performance segment
System Design and Build	$	3,813	$	6,442
Software		910		749
Training and Consulting Services		4,988		4,999
NITC segment
Training and Consulting Services		7,994		10,004
Total revenue	$	17,705	$	22,194

Balance of Contract Liabilities and Revenue Recognized in Reporting Period

The following table reflects the revenue recognized in the reporting periods that were included in contract liabilities from contracts with customers:

(in thousands)

	Three months ended
	March 31, 2020		March 31, 2019
Revenue recognized in the period from amounts included in Billings in Excess of Revenue Earned at the beginning of the period	$	3,762		$	5,040