Note 17 - Segment and Related Information - Geographical Information (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
UNITED STATES
Sales									102,678,670	83,992,635
PUERTO RICO
Sales									619,625	601,232
MEXICO
Sales									309,978	0
CANADA
Sales									292,927	388,531
Other Foreign Countries [Member]
Sales									$ 261,027	$ 87,502