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Income Taxes
 12 Months Ended
Dec. 31, 2011
Income Tax Disclosure [Abstract]  
Income Tax Disclosure [Text Block]

(6) Income Taxes

     There was no income tax expense in 2011, 2010 and 2009 due to losses incurred by the Company.

     The tax effects of temporary differences that give rise to significant portions of the deferred tax assets at December 31, 2011 and 2010 are presented below.

      2011       2010
Deferred tax assets:  
Depreciation $ 91,000 $ 86,000
       Capital loss carryforward -- 312,000
       Allowance for bad debts 37,000 65,000
       Net operating loss carryforwards     22,516,000   21,817,000
       Stock option expense   1,051,000   1,051,000
       Research and other credits 1,008,000 998,000
       Other temporary differences 15,000   15,000
              Total gross deferred tax assets 24,718,000 24,344,000
       Less valuation allowance        (24,718,000 )        (24,344,000 )
$ -- $ --
 

     In assessing the realizability of deferred tax assets, the Company considers whether it is more likely than not that some portion or all of the deferred tax assets will not be realized. The ultimate realization of deferred tax assets is dependent upon future taxable income during the period in which those temporary differences become deductible. The Company considers the scheduled reversal of deferred tax liabilities, projected future taxable income, and tax planning strategies in making this assessment. Based upon its historical operating losses, utilization of deferred tax assets cannot currently be determined. Accordingly, the Company has recorded a full valuation allowance against the deferred tax assets, as they will not be realized until the Company achieves profitable operations in the future.

     At December 31, 2011, the Company had a net operating loss carryforward for federal income tax purposes of $55,000,000, varying amounts of which will expire in each year from 2012 through 2031. Research and other credit carryforwards of $1,008,000 are available to the Company to reduce income taxes payable in future years principally through 2031. Net operating loss carryforwards of $3,333,000 and research and other credit carryforwards of $75,000 are scheduled to expire during fiscal 2012, if not utilized.