Note 2 - Summary of Significant Accounting Policies - Concentrations (Details) - customer	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenue Benchmark
Concentrations
Number of Major Customers		3		3
Customer Concentration Risk | Revenue Benchmark
Concentrations
Number of Major Customers	4		2
Customer Concentration Risk | Revenue Benchmark | Customer A
Concentrations
Concentration Risk, Percentage	19.00%		23.00%
Customer Concentration Risk | Revenue Benchmark | Customer B
Concentrations
Concentration Risk, Percentage	13.00%
Customer Concentration Risk | Revenue Benchmark | Customer C
Concentrations
Concentration Risk, Percentage	12.00%		17.00%
Customer Concentration Risk | Revenue Benchmark | Customer D
Concentrations
Concentration Risk, Percentage	12.00%
Customer Concentration Risk | Revenue Benchmark | Total Customer Base
Concentrations
Concentration Risk, Percentage	56.00%	64.00%	40.00%
Customer Concentration Risk | Accounts Receivable.
Concentrations
Number of Major Customers	4
Customer Concentration Risk | Accounts Receivable. | Total Customer Base
Concentrations
Concentration Risk, Percentage	44.00%			59.00%