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Note 3 - Revenue (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

Disaggregation of Revenue [Table Text Block]

		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

		Year Ended December 31, 2021

		Over time				Point in time				Total
Energy		$	1,141			$	-			$	1,141
Aerospace			386				2,214				2,600
Industrial			4,989				3,863				8,852
Research			2,294				1,560				3,854
Total		$	8,810			$	7,637			$	16,447

Schedule Of Cost And Estimated Earnings In Excess Of Billings [Table Text Block]

		2022				2021
Costs incurred on contracts in progress		$	14,390			$	7,419
Estimated earnings			10,926				5,071
			25,316				12,490
Billings to date			(26,925	)			(11,409	)
			(1,609	)			1,081
Deferred revenue related to non-systems contracts			(263	)			(193	)
		$	(1,872	)		$	888
Included in accompanying consolidated balance sheets under the following captions (in thousands):

Contract assets		$	2,170			$	2,538
Contract liabilities		$	4,042			$	1,650