Note 16 - Concentrations - Concentration Risk (Details) - Customer Concentration Risk [Member]	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Accounts Receivable [Member] | Customer Four [Member]
Concentration risk, percentage	28.00%		30.00%
Accounts Receivable [Member] | Customer Five [Member]
Concentration risk, percentage	15.00%		16.00%
Accounts Receivable [Member] | Customer Six [Member]
Concentration risk, percentage	13.00%
Accounts Receivable [Member] | Three Customers [Member]
Concentration risk, percentage	56.00%		46.00%
Revenue Benchmark [Member] | Customer Four [Member]
Concentration risk, percentage	28.00%
Revenue Benchmark [Member] | Customer One [Member]
Concentration risk, percentage		40.00%
Revenue Benchmark [Member] | Customer Five [Member]
Concentration risk, percentage	19.00%
Revenue Benchmark [Member] | Customer Two [Member]
Concentration risk, percentage		27.00%
Revenue Benchmark [Member] | Customer Six [Member]
Concentration risk, percentage	14.00%
Revenue Benchmark [Member] | Customer Three [Member]
Concentration risk, percentage		16.00%
Revenue Benchmark [Member] | Six Customers [Member]
Concentration risk, percentage	61.00%	83.00%