Revenue from Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Nov. 30, 2021	Nov. 30, 2020	Nov. 30, 2021	Nov. 30, 2020
Disaggregation Of Revenue [Line Items]
Net sales	$ 191,871	$ 201,065	$ 472,040	$ 401,084
Corporate, Non-Segment [Member]
Disaggregation Of Revenue [Line Items]
Net sales	194	195	415	439
Automotive [Member] | Operating Segments [Member]
Disaggregation Of Revenue [Line Items]
Net sales	61,589	61,488	150,007	111,397
Automotive [Member] | Operating Segments [Member] | OEM Products [Member]
Disaggregation Of Revenue [Line Items]
Net sales	18,536	14,089	49,853	32,462
Automotive [Member] | Operating Segments [Member] | Aftermarket Products [Member]
Disaggregation Of Revenue [Line Items]
Net sales	43,053	47,399	100,154	78,935
Consumer Electronics [Member] | Operating Segments [Member]
Disaggregation Of Revenue [Line Items]
Net sales	129,733	139,039	320,805	288,545
Consumer Electronics [Member] | Operating Segments [Member] | Premium Audio Products [Member]
Disaggregation Of Revenue [Line Items]
Net sales	104,877	112,681	252,610	216,501
Consumer Electronics [Member] | Operating Segments [Member] | Other Consumer Electronic Products [Member]
Disaggregation Of Revenue [Line Items]
Net sales	24,856	26,358	68,195	72,044
Biometrics [Member] | Operating Segments [Member]
Disaggregation Of Revenue [Line Items]
Net sales	355	343	813	703
Biometrics [Member] | Operating Segments [Member] | Biometric Products [Member]
Disaggregation Of Revenue [Line Items]
Net sales	$ 355	$ 343	$ 813	$ 703