Note 9 - Segment Information - Geographic Data (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Net revenues	$ 34,041	$ 49,396
Geographic Concentration Risk [Member] \| Revenue Benchmark [Member]
Percent of consolidated net revenue	100.00%	100.00%
UNITED STATES
Net revenues	$ 30,876	$ 28,822
UNITED STATES \| Geographic Concentration Risk [Member] \| Revenue Benchmark [Member]
Percent of consolidated net revenue	90.70%	58.30%
SOUTH AFRICA
Net revenues	$ 0	$ 8,277
SOUTH AFRICA \| Geographic Concentration Risk [Member] \| Revenue Benchmark [Member]
Percent of consolidated net revenue	0.00%	16.80%
MEXICO
Net revenues	$ 0	$ 3,267
MEXICO \| Geographic Concentration Risk [Member] \| Revenue Benchmark [Member]
Percent of consolidated net revenue	0.00%	6.60%
CHINA
Net revenues	$ 0	$ 2,698
CHINA \| Geographic Concentration Risk [Member] \| Revenue Benchmark [Member]
Percent of consolidated net revenue	0.00%	5.50%
JAPAN
Net revenues	$ 0	$ 1,418
JAPAN \| Geographic Concentration Risk [Member] \| Revenue Benchmark [Member]
Percent of consolidated net revenue	0.00%	2.90%
CANADA
Net revenues	$ 3,165	$ 3,269
CANADA \| Geographic Concentration Risk [Member] \| Revenue Benchmark [Member]
Percent of consolidated net revenue	9.30%	6.60%
INDIA
Net revenues	$ 0	$ 1,645
INDIA \| Geographic Concentration Risk [Member] \| Revenue Benchmark [Member]
Percent of consolidated net revenue	0.00%	3.30%