Unaudited Quarterly Financial Data Unaudited Quarterly Financial Data (Details) - USD ($)	3 Months Ended								12 Months Ended
	Feb. 28, 2017	Nov. 30, 2016	Aug. 31, 2016	May 31, 2016	Feb. 29, 2016	Nov. 30, 2015	Aug. 31, 2015	May 31, 2015	Feb. 28, 2017	Feb. 29, 2016	Feb. 28, 2015
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)											$ 0
Asset Impairment Charges									$ 0	$ 9,070,000	9,304,000
Impairment of Long-Lived Assets Held-for-use									0	0	(9,304,000)
Goodwill, Impairment Loss									0	0	0
Revenue, Net	$ 167,387,000	$ 198,937,000	$ 159,262,000	$ 155,456,000	$ 169,683,000	$ 192,506,000	$ 154,174,000	$ 164,383,000	681,042,000	680,746,000	757,498,000
Gross Profit	50,708,000	58,213,000	46,493,000	46,101,000	46,824,000	55,843,000	44,975,000	48,043,000	201,515,000	195,685,000	223,870,000
Net Income (Loss) Attributable to Parent	$ (90,000)	$ 5,800,000	$ 3,020,000	$ (4,308,000)	$ (5,351,000)	$ 7,777,000	$ (4,394,000)	$ (714,000)	$ 4,422,000	$ (2,682,000)	$ (942,000)
Earnings Per Share, Basic	$ 0.00	$ 0.24	$ 0.12	$ (0.18)	$ (0.22)	$ 0.32	$ (0.18)	$ (0.03)	$ 0.18	$ (0.11)	$ (0.04)
Earnings Per Share, Diluted	$ 0.00	$ 0.24	$ 0.12	$ (0.18)	$ (0.22)	$ 0.32	$ (0.18)	$ (0.03)			$ (0.04)
Impairment of Intangible Assets (Excluding Goodwill)									$ 0	$ 9,070,000	$ 0
Business Combination, Bargain Purchase, Gain Recognized, Amount									0	4,679,000	0
Premium Audio [Member]
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)										6,210,000
Goodwill, Impairment Loss									0	0	0
Revenue, Net									166,789,000	140,508,000	165,812,000
Consumer Accessories [Member]
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)										2,860,000
Revenue, Net									$ 176,216,000	$ 187,272,000	$ 194,104,000