Note 1 - Summary of Significant Accounting Policies - Major Customers (Details) - Customer Concentration Risk [Member]	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Revenue Benchmark [Member]
Percent of revenue	100.00%	100.00%
Revenue Benchmark [Member] | Major Customers [Member]
Percent of revenue	19.20%	33.90%
Revenue Benchmark [Member] | Other Customer [Member]
Percent of revenue	80.80%	66.10%
Accounts Receivable [Member]
Percent of revenue	100.00%	100.00%
Accounts Receivable [Member] | Major Customers [Member]
Percent of revenue	34.70%	47.50%
Accounts Receivable [Member] | Other Customer [Member]
Percent of revenue	65.30%	52.50%