Variable Interest Entity (Details) - USD ($) $ in Thousands	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	Feb. 28, 2014
Variable Interest Entity [Line Items]
Selling									$ 48,205	$ 48,513	$ 54,136
Income tax expense									1,759	(1,735)	1,638
Net sales	$ 167,387	$ 198,937	$ 159,262	$ 155,456	$ 169,683	$ 192,506	$ 154,174	$ 164,383	681,042	680,746	757,498
Total operating expenses									201,687	207,255	207,276
Operating loss									(172)	(11,570)	16,594
Interest and bank charges									7,488	8,075	6,851
Other Nonoperating Income (Expense)									(572)	632	1,495
General and administrative									107,882	111,382	114,849
Engineering and technical support									45,600	37,490	37,157
Net loss									(7,624)	(3,381)	0
Cash and cash equivalents	7,800				11,767				7,800	11,767	8,448	$ 10,603
Accounts receivable, net	90,641				87,055				90,641	87,055
Inventory, Net	153,053				144,028				153,053	144,028
Prepaid expenses and other current assets	19,593				17,256				19,593	17,256
Total current assets	273,348				264,051				273,348	264,051
Property, Plant and Equipment, Net	81,601				79,422				81,601	79,422
Intangible assets, net	176,289				185,022				176,289	185,022
Other Assets, Noncurrent	1,699				2,168				1,699	2,168
Total assets	668,486				667,190				668,486	667,190
Liabilities, Current	130,067				131,884				130,067	131,884
Long-term Debt	97,747				88,169				97,747	88,169
Other long-term liabilities	10,384				10,480				10,384	10,480
Total liabilities	277,171				271,296				277,171	271,296
Total liabilities and stockholders' equity	668,486				667,190				668,486	667,190
Cost of sales									479,527	485,061	533,628
Gross profit	50,708	$ 58,213	$ 46,493	$ 46,101	46,824	$ 55,843	$ 44,975	$ 48,043	201,515	195,685	$ 223,870
Eyelock [Member]
Variable Interest Entity [Line Items]
Selling									2,227	877
Loss before income taxes									(19,548)	(8,668)
Income tax expense									0	0
Net sales									243	143
Total operating expenses									17,881	8,509
Operating loss									(17,939)	(8,377)
Interest and bank charges									(1,609)	(294)
Other Nonoperating Income (Expense)									0	3
General and administrative									6,956	3,239
Engineering and technical support									8,698	4,393
Net loss									(19,548)	(8,668)
Cash and cash equivalents	11				20				11	20
Line of Credit Facility, Maximum Borrowing Capacity	12,000								12,000
Notes, Loans and Financing Receivable, Net, Noncurrent	22,098								22,098
Accounts receivable, net	295				195				295	195
Inventory, Net	135				304				135	304
Prepaid expenses and other current assets	189				256				189	256
Total current assets	630				775				630	775
Property, Plant and Equipment, Net	276				302				276	302
Intangible assets, net	39,187				42,249				39,187	42,249
Other Assets, Noncurrent	96				0				96	0
Total assets	40,189				43,326				40,189	43,326
Accounts payable	710				746				710	746
Accrued expenses and other current liabilities	3,506				1,103				3,506	1,103
Liabilities, Current	4,216				1,849				4,216	1,849
Long-term Debt	22,098				9,104				22,098	9,104
Other long-term liabilities					1,200					1,200
Total liabilities	27,514				12,153				27,514	12,153
Capital	40,891				39,841				40,891	39,841
Retained earnings	(28,216)				(8,668)				(28,216)	(8,668)
Total partners' equity	12,675				31,173				12,675	31,173
Total liabilities and stockholders' equity	$ 40,189				$ 43,326				40,189	43,326
Cost of sales									301	11
Gross profit									$ (58)	$ 132