Income Taxes - Components of Deferred Income Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Feb. 28, 2018	Feb. 28, 2017
Deferred tax assets
Allowance for doubtful receivables	$ 255	$ 512
Inventories	738	1,124
Employee compensation and benefits	703	1,448
Pension and noncurrent employee compensation benefits	2,888	5,786
Net operating loss and foreign tax credits	429	438
Stock options	285	552
Total deferred tax assets	5,298	9,860
Deferred tax liabilities
Property, plant and equipment	4,140	6,979
Goodwill and other intangible assets	7,158	9,371
Property tax	158	440
Other	31	23
Total deferred tax liabilities	11,487	16,813
Net deferred income tax liabilities	$ 6,189	$ 6,953