Variable Interest Entity (Details) - USD ($)	3 Months Ended									12 Months Ended
	Feb. 28, 2019	Nov. 30, 2018	Aug. 31, 2018	May 31, 2018	Feb. 28, 2018	Nov. 30, 2017	Aug. 31, 2017	May 31, 2017	Feb. 28, 2017	Feb. 28, 2019	Feb. 28, 2018	Feb. 28, 2017
Variable Interest Entity [Line Items]
Notes, Loans and Financing Receivable, Net, Noncurrent	1.50									1.50
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
Cost of Goods and Services Sold									370,500,000	325,399,000	374,795,000
Gross profit	23,754,000	$ 38,923,000	$ 31,063,000	$ 27,677,000	32,213,000	$ 41,519,000	$ 28,421,000	$ 30,144,000	144,030,000	121,417,000	132,297,000
Selling									43,108,000	40,915,000	45,999,000
Income tax expense									338,000	(6,131,000)	(17,445,000)
Interest and bank charges									(7,105,000)	(4,449,000)	(6,009,000)
Other Nonoperating Income (Expense)									(454,000)	577,000	(7,590,000)
General and administrative									79,573,000	66,935,000	78,957,000
Engineering and technical support									29,517,000	24,387,000	26,440,000
Cash and cash equivalents	58,236,000				51,740,000					58,236,000	51,740,000
Accounts receivable, net	73,391,000				81,116,000					73,391,000	81,116,000
Inventory, Net	(102,379,000)				(117,992,000)					(102,379,000)	(117,992,000)
Prepaid expenses and other current assets	10,449,000				14,007,000					10,449,000	14,007,000
Total current assets	246,385,000				265,859,000					246,385,000	265,859,000
Property, Plant and Equipment, Net	60,493,000				65,259,000					60,493,000	65,259,000
Intangible assets, net	119,449,000				150,320,000					119,449,000	150,320,000
Other Assets, Noncurrent	2,877,000				13,373,000					2,877,000	13,373,000
Total assets	508,811,000				575,644,000					508,811,000	575,644,000
Long-term Debt, Current Maturities	10,021,000				7,730,000					10,021,000	7,730,000
Liabilities, Current	(95,216,000)				(95,387,000)					(95,216,000)	(95,387,000)
Long-term Debt	5,776,000				8,476,000					5,776,000	8,476,000
Other long-term liabilities	2,981,000				3,187,000					2,981,000	3,187,000
Total liabilities	113,710,000				125,526,000					113,710,000	125,526,000
Retained Earnings (Accumulated Deficit)	148,582,000				194,673,000					148,582,000	194,673,000
Total liabilities and stockholders' equity	508,811,000				575,644,000					508,811,000	575,644,000
Total operating expenses									152,198,000	162,614,000	151,396,000
Operating income (loss)									(8,168,000)	(41,197,000)	(19,099,000)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest									(8,930,000)	(58,963,000)	(24,104,000)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest									(3,202,000)	(52,832,000)	27,959,000
Eyelock [Member]
Variable Interest Entity [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax									243,000	668,000	335,000
Cost of Goods and Services Sold									301,000	309,000	455,000
Gross profit									(58,000)	359,000	(120,000)
Selling									2,227,000	1,160,000	1,893,000
Income tax expense									0	0	0
Interest and bank charges									(1,609,000)	(4,013,000)	(2,869,000)
Other Nonoperating Income (Expense)									0	0	0
General and administrative									6,956,000	4,986,000	6,792,000
Engineering and technical support									8,698,000	7,487,000	7,159,000
Cash and cash equivalents	3,000				0					3,000	0
Accounts receivable, net	363,000				128,000					363,000	128,000
Inventory, Net	(27,000)				(119,000)					(27,000)	(119,000)
Prepaid expenses and other current assets	322,000				117,000					322,000	117,000
Total current assets	661,000				126,000					661,000	126,000
Property, Plant and Equipment, Net	120,000				186,000					120,000	186,000
Intangible assets, net	33,064,000				36,126,000					33,064,000	36,126,000
Other Assets, Noncurrent	253,000				119,000					253,000	119,000
Total assets	34,098,000				36,557,000					34,098,000	36,557,000
Accounts payable	1,122,000				1,292,000					1,122,000	1,292,000
Interest Payable, Current	8,729,000				4,734,000					8,729,000	4,734,000
Accrued expenses and other current liabilities	1,030,000				1,242,000					1,030,000	1,242,000
Long-term Debt, Current Maturities	44,937,000				33,722,000					44,937,000	33,722,000
Liabilities, Current	(55,818,000)				(40,990,000)					(55,818,000)	(40,990,000)
Other long-term liabilities	1,200,000				1,200,000					1,200,000	1,200,000
Total liabilities	57,018,000				42,190,000					57,018,000	42,190,000
Capital	41,416,000				41,416,000					41,416,000	41,416,000
Retained Earnings (Accumulated Deficit)	(64,336,000)				(47,049,000)					(64,336,000)	(47,049,000)
Total partners' equity	(22,920,000)				(5,633,000)					(22,920,000)	(5,633,000)
Total liabilities and stockholders' equity	34,098,000				$ 36,557,000					34,098,000	36,557,000
Total operating expenses									17,881,000	13,633,000	15,844,000
Operating income (loss)									(17,939,000)	(13,274,000)	(15,964,000)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest									(19,548,000)	(17,287,000)	(18,833,000)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest									$ (19,548,000)	$ (17,287,000)	$ (18,833,000)
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Debt Instrument, Interest Rate During Period										10.00%
Line of Credit Facility, Maximum Borrowing Capacity	$ 49,000,000									$ 49,000,000