Segment Information - Continuing Operations by Reportable Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Segment Reporting Information [Line Items]
Net sales	$ 127,297	$ 117,244	$ 380,726	$ 367,205
Income (loss) from operations	(2,117)	(4,612)	(10,051)	(5,222)
Interest Expense	(3,746)	(3,578)	(10,673)	(9,175)
Gain (Loss) on Derivatives and Other Non-operating Income (Expense) Net	1,156	4,346	4,219	(3,352)
Income (Loss) from operations before income taxes and share of income from joint venture	(4,707)	(3,844)	(16,505)	(17,749)
United States and Puerto Rico
Segment Reporting Information [Line Items]
Net sales	75,049	74,103	229,625	226,008
Operating Segments | Mobile Solutions
Segment Reporting Information [Line Items]
Net sales	76,122	68,586	225,542	220,248
Income (loss) from operations	(474)	(257)	3,224	8,342
Operating Segments | Mobile Solutions | United States and Puerto Rico
Segment Reporting Information [Line Items]
Net sales	35,419	35,812	109,183	108,534
Operating Segments | Power Solutions
Segment Reporting Information [Line Items]
Net sales	51,124	48,680	155,184	147,026
Income (loss) from operations	2,582	1,252	4,376	6,559
Operating Segments | Power Solutions | United States and Puerto Rico
Segment Reporting Information [Line Items]
Net sales	39,579	38,313	120,442	117,543
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Net sales	51	(22)	0	(69)
Income (loss) from operations	(4,225)	(5,607)	$ (17,651)	$ (20,123)
Intersegment Eliminations [Member] | United States and Puerto Rico
Segment Reporting Information [Line Items]
Net sales	$ 51	$ (22)