Financial and Product Information About Foreign and Domestic Operations Segment Data (Details)	3 Months Ended									6 Months Ended	12 Months Ended
	Feb. 28, 2019 USD ($)	Nov. 30, 2018 USD ($)	Aug. 31, 2018 USD ($)	May 31, 2018 USD ($)	Feb. 28, 2018 USD ($)	Nov. 30, 2017 USD ($)	Aug. 31, 2017 USD ($)	May 31, 2017 USD ($)	Feb. 28, 2017 USD ($)	Aug. 31, 2018 USD ($)	Feb. 28, 2019 USD ($)	Feb. 28, 2018 USD ($)	Feb. 28, 2017 USD ($)
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 107,457,000	$ 129,637,000	$ 108,867,000	$ 100,855,000	$ 122,236,000	$ 156,563,000	$ 113,470,000	$ 114,823,000	$ 514,530,000		$ 446,816,000	$ 507,092,000	$ 514,530,000
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)									0	$ 9,814,000	25,789,000	0
Impairment of Long-Lived Assets Held-for-use									0		3,473,000	0	0
Allowance for Loan and Lease Losses, Write-offs									0		16,509,000	0
Income (Loss) from Equity Method Investments									6,797,000		6,618,000	7,178,000
Interest and Debt Expense									7,105,000		4,449,000	6,009,000
Depreciation and amortization									12,386,000		12,344,000	12,174,000
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest									$ (8,930,000)		$ (58,963,000)	$ (24,104,000)
Number of Customers									0		0	0
Concentration Risk, Benchmark Description									.1		0.1	.1
Consumer Accessories [Member]
Segment Reporting Information [Line Items]
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)	$ 15,975,000									$ 9,654,000	$ 25,629,000
Automotive [Member]
Segment Reporting Information [Line Items]
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)											160,000
Operating Segments [Member] | Consumer Accessories [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax									$ 176,216,000		125,806,000	$ 178,756,000	176,216,000
Income (Loss) from Equity Method Investments									0		0	0
Interest and Debt Expense									4,716,000		7,602,000	7,113,000
Depreciation and amortization									4,702,000		4,259,000	4,663,000
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest									(20,300,000)		(55,035,000)	(23,841,000)
Operating Segments [Member] | Automotive [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax									170,729,000		161,647,000	155,480,000	170,729,000
Income (Loss) from Equity Method Investments									6,797,000		6,618,000	7,178,000
Interest and Debt Expense									3,109,000		868,000	967,000
Depreciation and amortization									1,322,000		1,002,000	1,027,000
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest									13,871,000		13,842,000	13,922,000
Operating Segments [Member] | Premium Audio [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax									166,789,000		158,436,000	172,406,000	166,789,000
Income (Loss) from Equity Method Investments									0		0	0
Interest and Debt Expense									5,295,000		7,263,000	7,979,000
Depreciation and amortization									3,688,000		3,318,000	3,492,000
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest									8,316,000		6,759,000	1,137,000
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax									796,000		927,000	450,000	$ 796,000
Income (Loss) from Equity Method Investments									0		0	0
Interest and Debt Expense									(6,015,000)		(11,284,000)	(10,050,000)
Depreciation and amortization									2,674,000		3,765,000	2,992,000
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest									$ (10,817,000)		$ (24,529,000)	$ (15,322,000)