Description of Business and Summary of Significant Accounting Policies Goodwill and Intangible Assets (Tables)

12 Months Ended

Feb. 28, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

 At February 28, 2019, the estimated aggregate amortization expense for all amortizable intangibles for each of the succeeding five fiscal years is as follows:

Fiscal Year	Amount
2020	$	6,931
2021	6,724
2022	6,596
2023	5,650
2024	5,436

Schedule of Intangible Assets and Goodwill [Table Text Block]

The change in the carrying amount of goodwill is as follows:

	February 28, 2019			February 28, 2018			February 28, 2017
Beginning of period	$	54,785		$	53,905		$	53,905
Goodwill acquired (see Note 2)	—			880			—
End of period	$	54,785		$	54,785		$	53,905
Gross carrying amount	$	86,948		$	86,948		$	86,068
Accumulated impairment charges	(32,163		)	(32,163		)	(32,163		)
Net carrying amount	$	54,785		$	54,785		$	53,905

	February 28, 2019			February 28, 2018			February 28, 2017
Automotive
Beginning of period	$	8,252		$	7,372		$	7,372
Goodwill acquired (see Note 2)	—			880			—
End of period	$	8,252		$	8,252		$	7,372
Gross carrying amount	$	8,252		$	8,252		$	7,372
Accumulated impairment charge	—			—			—
Net carrying amount	$	8,252		$	8,252		$	7,372
Premium Audio
Beginning of period	$	46,533		$	46,533		$	46,533
Impairment charge	—			—			—
End of period	$	46,533		$	46,533		$	46,533
Gross carrying amount	$	78,696		$	78,696		$	78,696
Accumulated impairment charge	(32,163		)	(32,163		)	(32,163		)
Net carrying amount	$	46,533		$	46,533		$	46,533
Total goodwill, net	$	54,785		$	54,785		$	53,905

Note: The Company's Consumer Accessories segment did not carry a balance for goodwill at February 28, 2019, February 28, 2018, or February 28, 2017

Schedule of Intangible Assets, Excluding Goodwill [Table Text Block]

	February 28, 2019
	Gross Carrying Value		Accumulated Amortization		Total Net Book Value
Finite-lived intangible assets:
Customer relationships (4-20 years)	$	49,743	$	29,746	$	19,997
Trademarks/Tradenames (3-12 years)	485		413		72
Developed technology (11.5 years)	31,290		9,523		21,767
Patents (4-13 years)	5,390		2,907		2,483
License (5 years)	1,400		1,400		—
Contracts (5 years)	2,141		1,966		175
Total finite-lived intangible assets	$	90,449	$	45,955	44,494
Indefinite-lived intangible assets
Trademarks					74,955
Total net intangible assets					$	119,449

	February 28, 2018
	Gross Carrying Value		Accumulated Amortization		Total Net Book Value
Finite-lived intangible assets:
Customer relationships (4-20 years)	$	50,249	$	26,807	$	23,442
Trademarks/Tradenames (3-12 years)	415		400		15
Developed technology (11.5 years)	31,290		6,802		24,488
Patents (4-13 years)	2,830		2,138		692
License (5 years)	1,400		1,400		—
Contracts (5 years)	2,141		1,849		292
Total finite-lived intangible assets	$	88,325	$	39,396	48,929
Indefinite-lived intangible assets
Trademarks					101,391
Total net intangible assets					$	150,320