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Convertible note and warrants (Details Textual) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Debt Instrument, Convertible, Effective Interest Rate     8.00%  
Debt Conversion, Converted Instrument, Shares Issued     1,166,667  
Debt Instrument, Convertible, Conversion Price $ 3.00   $ 3.00  
Debt Conversion, Converted Instrument, Warrants or Options Issued     875,000  
Proceeds from issuance of convertible notes payable $ 3,500 $ 0 $ 3,500 $ 0
Debt Instrument, Convertible, Terms of Conversion Feature     The Note is convertible at the option of the holder at a conversion price of $3.00 per share and the Company can require conversion into Company Common Stock if the Weighted Average Price of the Common Stock equals or exceeds 200% of the conversion price for no less than twenty (20) Trading Days during any thirty (30) consecutive Trading Day period occurring following the issuance date, subject to a 9.99% beneficial ownership ceiling for Investor's ownership of Company Common Stock at any one time.  
Debt Instrument Convertible Terms Of Conversion Feature Warrants     The HB Warrant is exercisable at the option of the holder at a $3.00 per share exercise price and the Company can require exercise if the Weighted Average Price of the Company's Common Stock equals or exceeds 250% of the exercise price for no less than twenty (20) Trading Days during any thirty (30) consecutive Trading Day period occurring following the issuance date, as such terms are defined in the HB Warrant.  
Percentage Of Conversion Amount To Be Redeemed     125.00%  
Maximum Common Stock Issuable In Satisfaction Of Interest Due     140,000  
Maximum Common Stock Issuable Pursuant To Note and Warrant     2,041,667  
Issuable Of Common Stock For Investment Banking Services     75,000  
Financing and Issuance Costs     688  
Issuance Of Restricted Common Stock     75,000  
Restricted Common Stock Fair Market Value 315   315  
Deferred Financing Costs 588   588  
Warrant Issuance Costs     100  
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year 175   175  
Fair Value Assumptions, Expected Volatility Rate     75.00%  
Fair Value Assumptions, Risk Free Interest Rate     0.80%  
Fair Value Assumptions, Expected Dividend Rate     0.00%  
Maximum Trading Shares Per Day     30,000  
Maximum Issuable Shares Under Note and Warrants     2,000,000  
Maximum Percentage Of Stock Options Discounted     30.00%  
Warrants Issued Fair Value     500  
Beneficial conversion feature on convertible note $ 500 $ 0 $ 500 $ 0
Fair Value Assumptions, Expected Term 4 years   5 years