Annual report pursuant to Section 13 and 15(d)

Income Taxes (Details Textual)

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Income Taxes (Details Textual) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Income Taxes (Textual) [Abstract]      
Penalties or interest liability accrued $ 0 $ 0  
Penalties or interest expense 0 0 0
Pretax income 1,000,000 900,000 100,000
Foreign tax credit 1,400,000    
Operating loss carryforwards, expiration dates These state net operating loss carryforwards amount to approximately $13.2 million and expire at various dates from 2027 through 2032.    
Deferred tax assets 5,000,000    
Estimated Benefits for research and development tax credits 0    
Tax benefits 700,000    
Tax benefits Reserve 700,000    
State and Local Jurisdiction [Member]
      
Operating Loss Carryforwards [Line Items]      
Net operating loss carryforwards $ 13,200,000