Note 13 - Major Customers and Related Information (Details Textual) - Customer Concentration Risk [Member]		3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Revenue Benchmark [Member] | Distributors [Member]
Number of Major Customers		3	2	1	4
Revenue Benchmark [Member] | Agencies [Member]
Number of Major Customers		1
Concentration Risk, Percentage		11.00%
Revenue Benchmark [Member] | Distributor One [Member]
Concentration Risk, Percentage		24.00%	37.00%	25.00%	20.00%
Revenue Benchmark [Member] | Distributor Two [Member]
Concentration Risk, Percentage		18.00%	22.00%		17.00%
Revenue Benchmark [Member] | Distributor Three [Member]
Concentration Risk, Percentage		12.00%			13.00%
Revenue Benchmark [Member] | Distributor Four [Member]
Concentration Risk, Percentage					12.00%
Accounts Receivable [Member] | Distributors [Member]
Number of Major Customers	2					3
Accounts Receivable [Member] | Distributor One [Member]
Concentration Risk, Percentage	18.00%					48.00%
Accounts Receivable [Member] | Distributor Two [Member]
Concentration Risk, Percentage	11.00%					16.00%
Accounts Receivable [Member] | Distributor Three [Member]
Concentration Risk, Percentage						15.00%