XML 41 R53.htm IDEA: XBRL DOCUMENT v2.4.0.6
Income Taxes - Net deferred tax asset components (Details) (USD $)
Feb. 28, 2013
Feb. 29, 2012
Income Tax Disclosure [Abstract]    
Inventory $ 129,000 $ 126,000
Allowance for accounts receivable 8,000 10,000
Accrued expenses and other 111,000 91,000
Research tax credits 100,000 110,000
Deferred tax asset 348,000 337,000
Deferred tax liability 258,000 251,000
Net deferred tax asset $ 90,000 $ 86,000