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Segment Information - Summary of Company's Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Net sales
Net sales	$ 99,239	$ 88,299	$ 281,320	$ 250,202
Income taxes
Income taxes	3,461	1,792	6,163	3,809
Net income (loss)
Net income (loss)	6,278	4,742	11,952	10,154
Assets
Total identifiable assets	362,625		362,625		$ 340,937
PLP-USA [Member]
Assets
Total identifiable assets	122,298		122,298		122,326
The Americas [Member]
Assets
Total identifiable assets	71,895		71,895		63,643
EMEA [Member]
Assets
Total identifiable assets	57,712		57,712		54,493
Asia-Pacific [Member]
Assets
Total identifiable assets	110,720		110,720		$ 100,475
Operating Segments [Member] | PLP-USA [Member]
Net sales
Net sales	40,181	35,287	113,130	104,117
Income taxes
Income taxes	1,666	327	1,706	433
Net income (loss)
Net income (loss)	1,918	1,967	2,235	1,809
Operating Segments [Member] | The Americas [Member]
Net sales
Net sales	18,425	16,790	51,821	43,761
Income taxes
Income taxes	1,117	775	2,632	2,015
Net income (loss)
Net income (loss)	2,250	1,777	5,825	3,965
Operating Segments [Member] | EMEA [Member]
Net sales
Net sales	15,190	15,239	46,620	43,815
Income taxes
Income taxes	531	365	1,109	1,545
Net income (loss)
Net income (loss)	1,259	1,314	2,547	4,944
Operating Segments [Member] | Asia-Pacific [Member]
Net sales
Net sales	25,443	20,983	69,749	58,509
Income taxes
Income taxes	147	325	716	(184)
Net income (loss)
Net income (loss)	851	(316)	1,345	(564)
Intersegment Eliminations [Member]
Intersegment sales
Intersegment sales	5,910	6,040	19,772	17,499
Intersegment Eliminations [Member] | PLP-USA [Member]
Intersegment sales
Intersegment sales	2,458	2,647	8,476	6,825
Intersegment Eliminations [Member] | The Americas [Member]
Intersegment sales
Intersegment sales	1,284	1,460	3,992	4,026
Intersegment Eliminations [Member] | EMEA [Member]
Intersegment sales
Intersegment sales	266	160	866	816
Intersegment Eliminations [Member] | Asia-Pacific [Member]
Intersegment sales
Intersegment sales	$ 1,902	$ 1,773	$ 6,438	$ 5,832

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