Note 2 - Summary of Significant Accounting Policies - Disagregation of Revenue (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Sales	$ 27,320,481	$ 26,397,857	$ 26,449,885	$ 23,994,004	$ 19,933,941	$ 21,277,797	$ 18,576,588	$ 25,281,574	$ 104,162,227	$ 85,069,900
Transferred over Time [Member]
Sales									39,786,609	43,391,176
Transferred at Point in Time [Member]
Sales									$ 64,375,618	$ 41,678,724