Note 4 - Inventory - Inventory (Details) - USD ($)	Mar. 31, 2023	Dec. 31, 2022
Raw materials and component parts	$ 3,169,053	$ 2,892,820
Work-in-process	5,045,284	5,158,252
Finished products	12,898,106	13,483,017
Total inventory	21,112,443	21,534,089
Less: inventory reserves	1,385,264	1,357,947
Net inventory	$ 19,727,179	$ 20,176,142