Note 1 - Nature of Business and Summary of Significant Accounting Policies - Major Customers (Details) - Customer Concentration Risk [Member]	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Revenue Benchmark [Member]
Percent of revenue	100.00%	100.00%	100.00%	100.00%
Revenue Benchmark [Member] \| Major Customers [Member]
Percent of revenue	21.60%	70.80%	40.20%	44.60%
Revenue Benchmark [Member] \| Other Customer [Member]
Percent of revenue	78.40%	29.20%	59.80%	55.40%
Accounts Receivable [Member]
Percent of revenue	100.00%	100.00%	100.00%	100.00%
Accounts Receivable [Member] \| Major Customers [Member]
Percent of revenue	29.50%	38.70%	29.50%	38.70%
Accounts Receivable [Member] \| Other Customer [Member]
Percent of revenue	70.50%	61.30%	70.50%	61.30%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.