Note 3 - Revenue - Disaggregation of Revenue (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Net Revenue	$ 16,446,813	$ 16,920,219
Transferred over Time [Member]
Net Revenue	8,810,000	6,664,000
Transferred at Point in Time [Member]
Net Revenue	7,637,000	10,256,000
Aerospace [Member]
Net Revenue	2,600,000	7,620,000
Aerospace [Member] | Transferred over Time [Member]
Net Revenue	386,000	1,607,000
Aerospace [Member] | Transferred at Point in Time [Member]
Net Revenue	2,214,000	6,013,000
Industrial [Member]
Net Revenue	9,993,000	5,414,000
Industrial [Member] | Transferred over Time [Member]
Net Revenue	6,130,000	1,849,000
Industrial [Member] | Transferred at Point in Time [Member]
Net Revenue	3,863,000	3,565,000
Research [Member]
Net Revenue	3,854,000	3,886,000
Research [Member] | Transferred over Time [Member]
Net Revenue	2,294,000	3,208,000
Research [Member] | Transferred at Point in Time [Member]
Net Revenue	$ 1,560,000	$ 678,000