Note 12 - Segment Reporting - Summary of Segment Reporting Information, By Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Revenue	$ 172,787	$ 162,687	$ 524,888	$ 465,753
Operating income (loss)	8,339	8,015	29,232	(12,569)
Goodwill, Impairment Loss	0		0	22,708	$ 35,944
Property, plant and equipment, net	35,228		35,228		34,225
Operating Segments [Member]
Operating income (loss)	10,941	10,618	36,977	17,905
Segment Reconciling Items [Member]
Goodwill, Impairment Loss	0	0	0	(22,708)
Intangible amortization	(2,602)	(2,603)	(7,745)	(7,766)
Americas [Member]
Property, plant and equipment, net	11,999		11,999		14,455
Americas [Member] | Operating Segments [Member]
Revenue	54,743	64,597	203,348	191,244
Operating income (loss)	(5,070)	4,052	2,194	4,723
India and Sri Lanka [Member]
Property, plant and equipment, net	9,101		9,101		8,069
India and Sri Lanka [Member] | Operating Segments [Member]
Revenue	29,471	19,821	75,032	60,771
Operating income (loss)	3,621	(1,633)	4,987	(2,538)
Malaysia 1 [Member]
Property, plant and equipment, net	3,106		3,106		3,749
Malaysia 1 [Member] | Operating Segments [Member]
Revenue	12,721	13,933	41,502	37,835
Operating income (loss)	3,873	3,580	11,701	8,520
Middle East [Member]
Property, plant and equipment, net	7,025		7,025		4,736
Middle East [Member] | Operating Segments [Member]
Revenue	54,829	43,665	143,783	114,425
Operating income (loss)	7,086	3,156	15,836	5,371
Argentina and Peru [Member]
Property, plant and equipment, net	1,604		1,604		1,257
Argentina and Peru [Member] | Operating Segments [Member]
Revenue	9,758	9,312	27,060	28,517
Operating income (loss)	557	854	121	494
Rest of World [Member]
Property, plant and equipment, net	2,393		2,393		$ 1,959
Rest of World [Member] | Operating Segments [Member]
Revenue	11,265	11,359	34,163	32,961
Operating income (loss)	$ 874	$ 609	$ 2,138	$ 1,335