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Income Taxes (Details Textual) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Income Tax (Textual)      
Interest or penalties related to unrecognized tax benefits $ 0 $ 0 $ 0
Accrued interest and penalties related to uncertain tax 0 0  
Uncertain tax positions 0    
Description of income tax withholding Payments related to the license agreement with Sony Corporation are net of 10% income tax withholding as required by the Japanese government under the Sweden and Japan international tax treaty.    
Amount withheld to offset future tax income tax payable 123,000 78,000 48,000
Expiration period of income tax withholding 5 years    
Open tax years 1997 through 2011.    
Federal [Member]
      
Income Tax (Textual)      
Operating loss carryforwards 17,800,000    
Operating loss carryforwards, expiration date 2029    
Deferred tax assets related to excess tax benefits for stock based compensation 160,000    
State [Member]
      
Income Tax (Textual)      
Operating loss carryforwards 8,500,000    
Operating loss carryforwards, expiration date 2019    
Deferred tax assets related to excess tax benefits for stock based compensation 17,000    
Foreign [Member]
      
Income Tax (Textual)      
Operating loss carryforwards $ 0    
Operating loss carryforwards, expiration date Indefinitely