Note 12 - Segment Information - Geographic Data (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Net revenues	$ 261,268	$ 255,719
Geographic Concentration Risk [Member] | Revenue Benchmark [Member]
Percent of consolidated net revenue	100.00%	100.00%
UNITED STATES
Net revenues	$ 112,327	$ 100,326
UNITED STATES | Geographic Concentration Risk [Member] | Revenue Benchmark [Member]
Percent of consolidated net revenue	43.00%	39.10%
BRAZIL
Net revenues	$ 68,301	$ 55,219
BRAZIL | Geographic Concentration Risk [Member] | Revenue Benchmark [Member]
Percent of consolidated net revenue	26.10%	21.60%
SOUTH AFRICA
Net revenues	$ 36,678	$ 35,498
SOUTH AFRICA | Geographic Concentration Risk [Member] | Revenue Benchmark [Member]
Percent of consolidated net revenue	14.00%	13.90%
MEXICO
Net revenues	$ 9,706	$ 22,459
MEXICO | Geographic Concentration Risk [Member] | Revenue Benchmark [Member]
Percent of consolidated net revenue	3.70%	8.80%
CHINA
Net revenues	$ 10,931	$ 15,769
CHINA | Geographic Concentration Risk [Member] | Revenue Benchmark [Member]
Percent of consolidated net revenue	4.20%	6.20%
JAPAN
Net revenues	$ 7,133	$ 9,704
JAPAN | Geographic Concentration Risk [Member] | Revenue Benchmark [Member]
Percent of consolidated net revenue	2.70%	3.80%
INDIA
Net revenues	$ 6,276	$ 7,058
INDIA | Geographic Concentration Risk [Member] | Revenue Benchmark [Member]
Percent of consolidated net revenue	2.40%	2.80%
CANADA
Net revenues	$ 8,247	$ 8,426
CANADA | Geographic Concentration Risk [Member] | Revenue Benchmark [Member]
Percent of consolidated net revenue	3.20%	3.30%
AUSTRALIA
Net revenues	$ 1,669	$ 1,260
AUSTRALIA | Geographic Concentration Risk [Member] | Revenue Benchmark [Member]
Percent of consolidated net revenue	0.60%	0.50%