Note 12 - Segment and Geographical Information - Summary of Segment Reporting Information, By Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Revenue	$ 162,687	$ 164,630	$ 465,753	$ 486,324
Operating income (loss)	8,015	5,342	(12,569)	9,264
Goodwill, Impairment Loss			22,708
Property, plant and equipment, net	34,423		34,423		$ 37,507
Operating Segments [Member]
Operating income (loss)	10,618	7,628	17,905	16,926
Segment Reconciling Items [Member]
Goodwill, Impairment Loss	0	0	22,708	0
Intangible amortization	2,603	2,286	7,766	7,662
Americas [Member]
Property, plant and equipment, net	11,800		11,800		14,156
Americas [Member] | Operating Segments [Member]
Revenue	64,597	67,072	191,244	184,070
Operating income (loss)	4,052	3,170	4,723	2,232
India and Sri Lanka [Member]
Property, plant and equipment, net	12,067		12,067		10,772
India and Sri Lanka [Member] | Operating Segments [Member]
Revenue	19,821	28,362	60,771	84,519
Operating income (loss)	(1,633)	1,050	(2,538)	1,302
Malaysia 1 [Member]
Property, plant and equipment, net	3,854		3,854		4,375
Malaysia 1 [Member] | Operating Segments [Member]
Revenue	13,933	13,312	37,835	46,508
Operating income (loss)	3,580	1,749	8,520	5,621
Middle East [Member]
Property, plant and equipment, net	4,468		4,468		4,722
Middle East [Member] | Operating Segments [Member]
Revenue	43,665	31,816	114,425	97,150
Operating income (loss)	3,156	(445)	5,371	4,939
Argentina and Peru [Member]
Property, plant and equipment, net	1,396		1,396		1,701
Argentina and Peru [Member] | Operating Segments [Member]
Revenue	9,312	11,637	28,517	36,060
Operating income (loss)	854	1,317	494	1,197
Rest of World [Member]
Property, plant and equipment, net	838		838		$ 1,781
Rest of World [Member] | Operating Segments [Member]
Revenue	11,359	12,431	32,961	38,017
Operating income (loss)	$ 609	$ 787	$ 1,335	$ 1,635