Note 2 - Summary of Significant Accounting Policies - Credit Concentration (Details) - Customer Concentration Risk [Member]	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Customer A [Member] | Revenue from Contract with Customer Benchmark [Member]
Credit concentration	47.00%	10.00%
Customer A [Member] | Accounts Receivable [Member]
Credit concentration	24.00%	10.00%
Customer B [Member] | Revenue from Contract with Customer Benchmark [Member]
Credit concentration	10.00%	10.00%
Customer F [Member] | Accounts Receivable [Member]
Credit concentration	10.00%	32.00%
Customer C [Member] | Revenue from Contract with Customer Benchmark [Member]
Credit concentration	10.00%	14.00%
Customer G [Member] | Accounts Receivable [Member]
Credit concentration	10.00%	12.00%
Customer D [Member] | Revenue from Contract with Customer Benchmark [Member]
Credit concentration	10.00%	11.00%
Customer E [Member] | Revenue from Contract with Customer Benchmark [Member]
Credit concentration	10.00%	11.00%