Accrued Liabilities (Detail) - USD ($) $ in Thousands	Feb. 28, 2018	Feb. 28, 2017	Feb. 29, 2016
Schedule of Accrued Liabilities [Line Items]
Accrued compensation and benefits	$ 342	$ 386
Accrued customer deposits	439	418
Accrued warranty	127	127	$ 125
Accrued professional fees		133
Accrued other	408	188
Accrued Customer Deposit and Accrued Liabilities Current, Total	$ 1,316	$ 1,252