Sources of Temporary Differences and Carry Forwards, and Their Effect on Net Deferred Tax Asset (Detail) - USD ($) $ in Thousands	Feb. 28, 2018	Feb. 28, 2017
Current deferred tax assets (liabilities):
Uniform capitalization costs	$ 88	$ 87
Inventory reserves	336	703
Accrued liabilities	70	127
Allowance for doubtful accounts	5	7
Other	(1)	(3)
Valuation Allowance	(498)	(921)
Net current deferred tax assets	0	0
Non-current deferred tax assets:
Amortization of intangibles	19	55
Deferred rent	14	67
Non-deductible losses	1,373	2,107
State net operating loss carry-forward	732	534
Federal net operating loss carry-forward	2,733	3,174
Federal tax credit carry forward	318	318
Foreign tax credit carry-forward	99	99
Basis difference of property, plant and equipment	33	106
Valuation allowance	(5,321)	(6,460)
Net non-current deferred tax assets	0	0
Net deferred tax assets	$ 0	$ 0