Convertible note and warrant (Details Textual) (USD $) In Thousands, except Share data, unless otherwise specified	0 Months Ended	1 Months Ended		12 Months Ended
	Oct. 09, 2012	Oct. 29, 2012	Oct. 31, 2012	Dec. 31, 2012	Dec. 31, 2011
Debt Conversion, Converted Instrument, Shares Issued				1,166,667
Debt Instrument, Convertible, Conversion Price				$ 3.00
Debt Conversion, Converted Instrument, Warrants or Options Issued				875,000
Common Stock Exercise Price				$ 3.00
Proceeds from issuance of convertible notes payable				$ 3,500
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.
Issuable Of Common Stock For Investment Banking Services				75,000
Issuance Of Restricted Common Stock				75,000
Restricted Common Stock Fair Market Value				315
Deferred Financing Costs				588
Warrant Issuance Costs				100
Amortization of intangible assets				118	0
Fair Value Assumptions, Expected Volatility Rate		75.00%
Fair Value Assumptions, Risk Free Interest Rate		0.76%
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	3,915			500	0
Fair Value Assumptions, Expected Term			5 years	4 years
Warrant Term				5 years
Beneficial Conversion Feature and Hb Warrant Discount Amortization Expense				199	0
Debt Instrument, Convertible, Interest Expense				93	0
Amortization				124	0
Extinguishment of Debt, Amount	2,574
Loss on extinguishment of convertible note	(355)			(355)	0
Convertible Notes Payable	2,698
Debt Instrument, Face Amount	3,500
Debt Instrument, Unamortized Discount	802
Beneficial conversion on issuance of convertible note	1,341			500
Extinguishment of Debt, Gain (Loss), Net of Tax	124
Payments of Financing Costs, Total	462
Legal Fees	17
Payment of Financing and Stock Issuance Costs				688
Senior Secured Convertible Notes [Member]
Agreements Initiation Date				Oct. 09, 2012
Extinguishment of Debt, Amount				3,500
Extinguishment Of Debt Shares Issued				100,000
Value Of Shares Issued For Extinguishment Of Debt				415
Loss on extinguishment of convertible note				$ 355
Hb Warrant [Member]
Fair Value Assumptions, Risk Free Interest Rate				0.80%
Percentage Of Weighted Average Price Of Company Common Stock				250.00%
Warrants Exercise Price				$ 3