Note 6 - Concentrations - Summary of Concentration Risks (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025	Dec. 31, 2024
Revenue from Contract with Customer, Excluding Assessed Tax	$ 1,150	$ 620	$ 4,940	$ 4,391
Customer Concentration Risk [Member] \| Revenue Benchmark [Member] \| Customer A [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 753	$ 344	$ 2,122	$ 1,796
Concentration Risk, Percentage	68.00%	49.00%	43.00%	41.00%
Customer Concentration Risk [Member] \| Revenue Benchmark [Member] \| Customer B [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 0	$ 156	$ 658	$ 494
Concentration Risk, Percentage	0.00%	22.00%	13.00%	11.00%
Customer Concentration Risk [Member] \| Revenue Benchmark [Member] \| Customer I [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 188	$ 0	$ 546	$ 8
Concentration Risk, Percentage	17.00%	0.00%	11.00%	0.00%

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.

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details