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Note 9 - Segment Information - Geographic Data (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Net revenues	$ 68,693	$ 64,380
Geographic Concentration Risk [Member] | Revenue Benchmark [Member]
Percent of consolidated net revenue	100.00%	100.00%
UNITED STATES
Net revenues	$ 28,822	$ 26,194
UNITED STATES | Geographic Concentration Risk [Member] | Revenue Benchmark [Member]
Percent of consolidated net revenue	42.00%	40.70%
BRAZIL
Net revenues	$ 19,297	$ 18,082
BRAZIL | Geographic Concentration Risk [Member] | Revenue Benchmark [Member]
Percent of consolidated net revenue	28.10%	28.10%
SOUTH AFRICA
Net revenues	$ 8,277	$ 9,701
SOUTH AFRICA | Geographic Concentration Risk [Member] | Revenue Benchmark [Member]
Percent of consolidated net revenue	12.00%	15.10%
MEXICO
Net revenues	$ 3,267	$ 2,472
MEXICO | Geographic Concentration Risk [Member] | Revenue Benchmark [Member]
Percent of consolidated net revenue	4.80%	3.80%
CHINA
Net revenues	$ 2,698	$ 2,677
CHINA | Geographic Concentration Risk [Member] | Revenue Benchmark [Member]
Percent of consolidated net revenue	3.90%	4.20%
JAPAN
Net revenues	$ 1,418	$ 1,553
JAPAN | Geographic Concentration Risk [Member] | Revenue Benchmark [Member]
Percent of consolidated net revenue	2.10%	2.40%
CANADA
Net revenues	$ 3,269	$ 1,830
CANADA | Geographic Concentration Risk [Member] | Revenue Benchmark [Member]
Percent of consolidated net revenue	4.80%	2.80%
INDIA
Net revenues	$ 1,645	$ 1,406
INDIA | Geographic Concentration Risk [Member] | Revenue Benchmark [Member]
Percent of consolidated net revenue	2.40%	2.20%
AUSTRALIA
Net revenues	$ 0	$ 465
AUSTRALIA | Geographic Concentration Risk [Member] | Revenue Benchmark [Member]
Percent of consolidated net revenue	0.00%	0.70%

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