Note 4 - Revenue Recognition (Tables)

3 Months Ended

Mar. 31, 2023

Notes Tables

Disaggregation of Revenue [Table Text Block]

	Three months ended March 31, 2023
	Over time		Point in time		Total
Energy	$	2,516	$	14	$	2,530
Aerospace		264		251		515
Industrial		3,670		213		3,883
Research		1,272		495		1,767
Total	$	7,722	$	973	$	8,695

	Three months ended March 31, 2022
	Over time		Point in time		Total
Energy	$	899	$	7	$	906
Aerospace		-		705		705
Industrial		997		872		1,869
Research		706		470		1,176
Total	$	2,602	$	2,054	$	4,656

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

Costs incurred on contracts in progress	$	13,229
Estimated earnings		8,832
	$	22,061
Billings to date		(19,492	)
		2,569
Deferred revenue related to non-system contracts		(124	)
	$	2,445
Included in accompanying condensed consolidated balance sheets under the following captions (in thousands):
Contract assets	$	3,706
Contract liabilities	$	1,261