Revenue from Contracts with Customers - Summary of Revenue from Contracts with Customers (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenue, Major Customer [Line Items]
Net sales	$ 213,256	$ 169,148
Intersegment Sales Eliminations
Revenue, Major Customer [Line Items]
Net sales	(484)	(528)
United States
Revenue, Major Customer [Line Items]
Net sales	153,431	119,808
United States | Intersegment Sales Eliminations
Revenue, Major Customer [Line Items]
Net sales	(484)	(528)
Chinese
Revenue, Major Customer [Line Items]
Net sales	12,683	13,192
Chinese | Intersegment Sales Eliminations
Revenue, Major Customer [Line Items]
Net sales	0	0
Mexico
Revenue, Major Customer [Line Items]
Net sales	8,214	10,605
Mexico | Intersegment Sales Eliminations
Revenue, Major Customer [Line Items]
Net sales	0	0
Brazil
Revenue, Major Customer [Line Items]
Net sales	8,451	9,935
Brazil | Intersegment Sales Eliminations
Revenue, Major Customer [Line Items]
Net sales	0	0
Germany
Revenue, Major Customer [Line Items]
Net sales	10,307	1,542
Germany | Intersegment Sales Eliminations
Revenue, Major Customer [Line Items]
Net sales	0	0
Switzerland
Revenue, Major Customer [Line Items]
Net sales	4,640	1,406
Switzerland | Intersegment Sales Eliminations
Revenue, Major Customer [Line Items]
Net sales	0	0
Poland
Revenue, Major Customer [Line Items]
Net sales	1,923	2,066
Poland | Intersegment Sales Eliminations
Revenue, Major Customer [Line Items]
Net sales	0	0
Italy
Revenue, Major Customer [Line Items]
Net sales	2,340	1,675
Italy | Intersegment Sales Eliminations
Revenue, Major Customer [Line Items]
Net sales	0	0
Czech Republic
Revenue, Major Customer [Line Items]
Net sales	1,697	1,810
Czech Republic | Intersegment Sales Eliminations
Revenue, Major Customer [Line Items]
Net sales	0	0
FRANCE
Revenue, Major Customer [Line Items]
Net sales	1,269
FRANCE | Intersegment Sales Eliminations
Revenue, Major Customer [Line Items]
Net sales	0
Africa
Revenue, Major Customer [Line Items]
Net sales	1,156
Africa | Intersegment Sales Eliminations
Revenue, Major Customer [Line Items]
Net sales	0
Netherlands
Revenue, Major Customer [Line Items]
Net sales		974
Netherlands | Intersegment Sales Eliminations
Revenue, Major Customer [Line Items]
Net sales		0
Other Country
Revenue, Major Customer [Line Items]
Net sales	7,145	6,135
Other Country | Intersegment Sales Eliminations
Revenue, Major Customer [Line Items]
Net sales	0	0
Mobile Solutions | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	78,075	89,794
Mobile Solutions | United States | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	44,457	49,655
Mobile Solutions | Chinese | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	9,153	11,581
Mobile Solutions | Mexico | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	5,378	7,236
Mobile Solutions | Brazil | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	8,382	9,885
Mobile Solutions | Germany | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	1,406	1,534
Mobile Solutions | Switzerland | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	1,359	1,406
Mobile Solutions | Poland | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	1,913	2,052
Mobile Solutions | Italy | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	1,856	1,577
Mobile Solutions | Czech Republic | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	1,509	1,810
Mobile Solutions | FRANCE | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	44
Mobile Solutions | Africa | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	0
Mobile Solutions | Netherlands | Operating Segments
Revenue, Major Customer [Line Items]
Net sales		0
Mobile Solutions | Other Country | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	2,618	3,058
Power Solutions | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	49,657	48,682
Power Solutions | United States | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	41,115	40,128
Power Solutions | Chinese | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	1,838	1,485
Power Solutions | Mexico | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	2,709	3,197
Power Solutions | Brazil | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	69	50
Power Solutions | Germany | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	16	7
Power Solutions | Switzerland | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	16	0
Power Solutions | Poland | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	4	14
Power Solutions | Italy | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	63	98
Power Solutions | Czech Republic | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	188	0
Power Solutions | FRANCE | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	0
Power Solutions | Africa | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	1,156
Power Solutions | Netherlands | Operating Segments
Revenue, Major Customer [Line Items]
Net sales		974
Power Solutions | Other Country | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	2,483	2,729
Life Sciences | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	86,008	31,200
Life Sciences | United States | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	68,343	30,553
Life Sciences | Chinese | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	1,692	126
Life Sciences | Mexico | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	127	172
Life Sciences | Brazil | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	0	0
Life Sciences | Germany | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	8,885	1
Life Sciences | Switzerland | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	3,265	0
Life Sciences | Poland | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	6	0
Life Sciences | Italy | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	421	0
Life Sciences | Czech Republic | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	0	0
Life Sciences | FRANCE | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	1,225
Life Sciences | Africa | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	0
Life Sciences | Netherlands | Operating Segments
Revenue, Major Customer [Line Items]
Net sales		0
Life Sciences | Other Country | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	$ 2,044	$ 348