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Income Taxes (Details) (USD $)
Jun. 30, 2012
Jun. 30, 2011
Deferred tax assets:    
Net operating loss and credit carryforwards $ 36,606,000 $ 36,370,000
Intangible assets 248,000 335,000
Capital loss and R&D credits 1,496,000 1,397,000
Research development expenses 694,000 780,000
Inventory 57,000 80,000
Accrued expenses and other 110,000 59,000
Gross deferred tax assets 39,211,000 38,949,000
Valuation allowance for deferred tax assets (38,800,000) (38,558,000)
Total deferred tax assets 411,000 391,000
Deferred tax liabilities:    
Depreciation and other (411,000) (391,000)
Net deferred tax liability