Revenue from Contracts with Customers - Summary of Revenue from Contracts with Customers (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenue, Major Customer [Line Items]
Net sales	$ 117,244	$ 113,761	$ 367,205	$ 308,506
Automotive
Revenue, Major Customer [Line Items]
Net sales	55,941	58,113	177,913	148,879
General Industrial
Revenue, Major Customer [Line Items]
Net sales	33,669	33,054	109,763	92,099
Residential/Commercial Electrical
Revenue, Major Customer [Line Items]
Net sales	16,257	12,996	48,237	39,695
Other
Revenue, Major Customer [Line Items]
Net sales	11,377	9,598	31,292	27,833
United States and Puerto Rico
Revenue, Major Customer [Line Items]
Net sales	74,103	72,390	226,008	198,844
China
Revenue, Major Customer [Line Items]
Net sales	11,598	14,365	42,019	35,192
Brazil
Revenue, Major Customer [Line Items]
Net sales	9,143	7,353	29,331	18,261
Mexico
Revenue, Major Customer [Line Items]
Net sales	9,608	7,693	27,198	21,247
Germany
Revenue, Major Customer [Line Items]
Net sales	1,239	1,532	4,635	4,662
Poland
Revenue, Major Customer [Line Items]
Net sales	701	1,346	2,792	3,452
Other
Revenue, Major Customer [Line Items]
Net sales	10,852	9,082	35,222	26,848
Operating Segments | Mobile Solutions
Revenue, Major Customer [Line Items]
Net sales	68,586	70,371	220,248	181,292
Operating Segments | Mobile Solutions | Automotive
Revenue, Major Customer [Line Items]
Net sales	43,486	47,484	139,877	119,069
Operating Segments | Mobile Solutions | General Industrial
Revenue, Major Customer [Line Items]
Net sales	21,396	19,912	70,155	55,069
Operating Segments | Mobile Solutions | Other
Revenue, Major Customer [Line Items]
Net sales	3,704	2,975	10,216	7,154
Operating Segments | Mobile Solutions | United States and Puerto Rico
Revenue, Major Customer [Line Items]
Net sales	35,812	37,116	108,534	94,482
Operating Segments | Mobile Solutions | China
Revenue, Major Customer [Line Items]
Net sales	10,849	12,785	38,482	31,203
Operating Segments | Mobile Solutions | Brazil
Revenue, Major Customer [Line Items]
Net sales	8,951	7,100	28,604	17,815
Operating Segments | Mobile Solutions | Mexico
Revenue, Major Customer [Line Items]
Net sales	4,981	4,454	14,825	11,746
Operating Segments | Mobile Solutions | Germany
Revenue, Major Customer [Line Items]
Net sales	1,080	1,400	4,216	4,401
Operating Segments | Mobile Solutions | Poland
Revenue, Major Customer [Line Items]
Net sales	698	1,342	2,782	3,441
Operating Segments | Mobile Solutions | Other
Revenue, Major Customer [Line Items]
Net sales	6,215	6,174	22,805	18,204
Operating Segments | Power Solutions
Revenue, Major Customer [Line Items]
Net sales	48,680	43,415	147,026	127,307
Operating Segments | Power Solutions | Automotive
Revenue, Major Customer [Line Items]
Net sales	12,455	10,629	38,036	29,810
Operating Segments | Power Solutions | General Industrial
Revenue, Major Customer [Line Items]
Net sales	12,273	13,142	39,608	37,030
Operating Segments | Power Solutions | Residential/Commercial Electrical
Revenue, Major Customer [Line Items]
Net sales	16,257	12,996	48,237	39,695
Operating Segments | Power Solutions | Other
Revenue, Major Customer [Line Items]
Net sales	7,695	6,648	21,145	20,772
Operating Segments | Power Solutions | United States and Puerto Rico
Revenue, Major Customer [Line Items]
Net sales	38,313	35,299	117,543	104,455
Operating Segments | Power Solutions | China
Revenue, Major Customer [Line Items]
Net sales	749	1,580	3,537	3,989
Operating Segments | Power Solutions | Brazil
Revenue, Major Customer [Line Items]
Net sales	192	253	727	446
Operating Segments | Power Solutions | Mexico
Revenue, Major Customer [Line Items]
Net sales	4,627	3,239	12,373	9,501
Operating Segments | Power Solutions | Germany
Revenue, Major Customer [Line Items]
Net sales	159	132	419	261
Operating Segments | Power Solutions | Poland
Revenue, Major Customer [Line Items]
Net sales	3	4	10	11
Operating Segments | Power Solutions | Other
Revenue, Major Customer [Line Items]
Net sales	4,637	2,908	12,417	8,644
Intersegment Sales Eliminations
Revenue, Major Customer [Line Items]
Net sales	(22)	(25)	(69)	(93)
Intersegment Sales Eliminations | Other
Revenue, Major Customer [Line Items]
Net sales	(22)	(25)	(69)	(93)
Intersegment Sales Eliminations | United States and Puerto Rico
Revenue, Major Customer [Line Items]
Net sales	$ (22)	$ (25)	$ (69)	$ (93)