Note 11 - Concentrations (Details Textual) - Customer Concentration Risk [Member]	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Revenue Benchmark [Member] | Customer One [Member]
Concentration Risk, Percentage	67.00%	70.00%
Revenue Benchmark [Member] | Customer Two [Member]
Concentration Risk, Percentage	13.00%	16.00%
Revenue Benchmark [Member] | Customer Three [Member]
Concentration Risk, Percentage	13.00%
Accounts Receivable [Member] | Customer One [Member]
Concentration Risk, Percentage	24.00%	22.00%
Accounts Receivable [Member] | Customer Two [Member]
Concentration Risk, Percentage	14.00%	18.00%
Accounts Receivable [Member] | Customer Three [Member]
Concentration Risk, Percentage	12.00%	11.00%
Accounts Receivable [Member] | Customer Four [Member]
Concentration Risk, Percentage	12.00%