Revenue (Tables)

12 Months Ended

Dec. 31, 2023

Revenue from Contract with Customer [Abstract]

Schedule of Disaggregation of Revenue

The following table represents a disaggregation of revenue from contracts by end markets for the years ended December 31, 2023 and 2022 (in thousands):

	Year Ended December 31, 2023
	Over time		Point in time		Total
Energy	$	4,901	$	189	$	5,090
Aerospace		3,427		1,469		4,896
Industrial		6,123		2,821		8,944
Research		3,700		1,479		5,179
Total	$	18,151	$	5,958	$	24,109

	Year Ended December 31, 2022
	Over time		Point in time		Total
Energy	$	9,094	$	58	$	9,152
Aerospace		95		1,527		1,622
Industrial		5,961		4,856		10,817
Research		2,807		1,415		4,222
Total	$	17,957	$	7,856	$	25,813

Schedule of Cost and Estimated Earnings in Excess of Billings

Contract assets and contract liabilities on input method type contracts in progress are summarized at December 31 as follows (in thousands):

	2023			2022
Costs incurred on contracts in progress	$	9,500		$	14,390
Estimated earnings		5,083			10,926
		14,583			25,316
Billings to date		(17,553	)		(26,925	)
		(2,970	)		(1,609	)
Deferred revenue related to non-systems contracts		(334	)		(263	)
	$	(3,304	)	$	(1,872	)
Included in accompanying consolidated balance sheets under the following captions (in thousands):
Contract assets	$	1,604		$	2,170
Contract liabilities	$	4,908		$	4,042