Note 3 - Revenue (Tables)

12 Months Ended

Dec. 31, 2020

Notes Tables

Disaggregation of Revenue [Table Text Block]

	Year Ending December 31, 2020
	Over time		Point in time		Total
Aerospace	$	1,607	$	6,013	$	7,620
Industrial	$	1,849	$	3,565	$	5,414
Research	$	3,208	$	678	$	3,886
Total	$	6,664	$	10,256	$	16,920

	Year ending December 31, 2019
	Over time		Point in time		Total
Aerospace	$	3,224	$	5,948	$	9,172
Industrial	$	3,199	$	3,994	$	7,193
Research	$	2,609	$	673	$	3,282
Total	$	9,032	$	10,615	$	19,647

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

	2020			2019
Costs incurred on contracts in progress	$	4,464,471		$	6,943,066
Estimated earnings		2,087,396			3,370,032
		6,551,867			10,313,098
Billings to date		(6,212,229	)		(10,645,800	)
	$	339,638		$	(332,702	)
Deferred revenue related to non-systems contracts		(632,014	)		(1,429,582	)
		(292,376	)	$	(1,762,284	)
Included in accompanying balance sheets
Under the following captions:
Contract assets	$	494,281		$	512,952
Contract liabilities	$	(786,657	)	$	(2,275,236	)