Note 9 - Concentrations - Accounts Receivables and Revenues (Details) - Customer Concentration Risk [Member]	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Accounts Receivable [Member] | Customer 1 [Member]
Concentration Risk, Percentage			43.00%
Accounts Receivable [Member] | Customer 2 [Member]
Concentration Risk, Percentage			12.00%
Accounts Receivable [Member] | Customer 3 [Member]
Concentration Risk, Percentage			11.00%
Accounts Receivable [Member] | Customer 4 [Member]
Concentration Risk, Percentage			9.00%		23.00%
Accounts Receivable [Member] | Customer 5 [Member]
Concentration Risk, Percentage					23.00%
Revenue from Contract with Customer Benchmark [Member] | Customer 1 [Member]
Concentration Risk, Percentage	24.00%	15.00%	36.00%	13.00%
Revenue from Contract with Customer Benchmark [Member] | Customer 2 [Member]
Concentration Risk, Percentage	32.00%		17.00%
Revenue from Contract with Customer Benchmark [Member] | Customer 3 [Member]
Concentration Risk, Percentage	11.00%	4.00%	8.00%	6.00%
Revenue from Contract with Customer Benchmark [Member] | Customer 4 [Member]
Concentration Risk, Percentage		18.00%		11.00%