Sources of Temporary Differences and Carry Forwards, and Their Effect on Net Deferred Tax Asset (Detail) - USD ($)
$ in Thousands
Feb. 29, 2020
Feb. 28, 2019
Current deferred tax assets(liabilities):    
Uniform capitalization costs $ 101 $ 85
Foreign tax credit carry-forward 73 99
Inventory reserves 191 211
Accrued liabilities 44 44
Allowance for doubtful accounts 2 4
Other (9) (10)
Non-current deferred tax assets:    
Federal net operating loss carry-forward 3,130 2,883
Non-deductible losses 1,365 1,360
State net operating loss carry-forward 808 717
Amortization of intangibles 1 2
Foreign tax credit carry-forward 319 318
Basis difference of property, plant and equipment 39 43
Valuation allowance (6,064) (5,756)
Net deferred tax assets $ 0 $ 0