Segment Information - Continuing Operations by Reportable Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Segment Reporting Information [Line Items]
Net sales	$ 125,362	$ 123,157	$ 253,429	$ 249,961
Income (loss) from operations	(4,514)	(1,588)	(7,934)	(610)
Interest Expense	(3,488)	(3,573)	(6,927)	(5,597)
Gain (Loss) on Derivatives and Other Non-operating Income (Expense) Net	67	(1,680)	3,063	(7,698)
Income (Loss) from operations before income taxes and share of income from joint venture	(7,935)	(6,841)	(11,798)	(13,905)
United States and Puerto Rico
Segment Reporting Information [Line Items]
Net sales	76,294	74,708	154,576	151,905
Operating Segments | Mobile Solutions
Segment Reporting Information [Line Items]
Net sales	73,350	73,886	149,420	151,662
Income (loss) from operations	1,729	2,509	3,698	8,599
Operating Segments | Mobile Solutions | United States and Puerto Rico
Segment Reporting Information [Line Items]
Net sales	35,954	35,284	73,764	72,722
Operating Segments | Power Solutions
Segment Reporting Information [Line Items]
Net sales	52,049	49,271	104,060	98,346
Income (loss) from operations	1,430	2,875	1,794	5,307
Operating Segments | Power Solutions | United States and Puerto Rico
Segment Reporting Information [Line Items]
Net sales	40,377	39,424	80,863	79,230
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Net sales	(37)	0	(51)	(47)
Income (loss) from operations	(7,673)	$ (6,972)	$ (13,426)	$ (14,516)
Intersegment Eliminations [Member] | United States and Puerto Rico
Segment Reporting Information [Line Items]
Net sales	$ (37)