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Consolidated Balance Sheets (Parenthetical) (USD $)	Nov. 30, 2011	Feb. 28, 2011
Statement of Financial Position [Abstract]
Less allowance	$ 35,000	$ 26,000
Less accumulated depreciation	$ 1,985,237	$ 1,834,560
Common stock, par value	$ 0.01	$ 0.01
Common stock, authorized	25,000,000	25,000,000
Common stock, issued shares	14,442,211	14,441,511
Common stock, outstanding shares	14,442,211	14,441,511

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The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

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