Long-term Debt (Details) (USD $)	3 Months Ended
	Mar. 31, 2013 Disbursement	Dec. 31, 2012
Long-term Debt [Abstract]
Date facility agreement entered	Feb. 13, 2013
Loan facility, maximum amount	$ 30,000,000
Number of disbursement under loan facility	2
First disbursement under loan facility	10,000,000
Second disbursement under loan facility	20,000,000
Loan facility payment terms	The principal amount of the loan is payable in equal annual installments on the fourth, fifth and sixth anniversaries of the facility agreement, provided that the amount payable on the fourth anniversary shall be deferred for one year if either (i) our "Net Sales" (defined below) for the immediately preceding 12-month period are at least $20 million, or (ii) our "Equity Value" (defined below) is at least $200 million; and provided further, that the amount payable on the fifth anniversary (together with any amount deferred on the fourth anniversary) shall be deferred until the sixth anniversary if either (x) our "Net Sales" for the immediately preceding 12 month period are at least $30 million, or (ii) our "Equity Value" is at least $250 million.
Transaction fee, percentage (in hundredths)	1.50%
Cash interest rate under loan facility (in hundredths)	8.75%
Loan facility, periodic payment, period deferred	1 year
Percentage sale of assets (in hundredths)	50.00%
Number of shares under issued warrants (in shares)	2,340,000
Exercise price of warrants (in dollars per share)	$ 2.81
Percentage premium on closing price (in hundredths)	24.00%
Number of shares under unissued warrants (in shares)	4,660,000
Percentage of common stock to single holder, maximum (in hundredths)	9.985%
Fair value of warrants issued upon advance of initial disbursement	3,800,000
Transaction fee	150,000
Significant unobservable input assumptions of Level 3 valuations [Abstract]
Historical Volatility	101.00%
Expected Term (in years)	6 years
Risk-free interest rate	0.12%
Carrying value of Facility Agreement [Abstract]
Principal Amount of Facility Agreement	10,000,000
Unamortized discount	(3,917,000)	0
Carrying amount of Facility Agreement	6,083,000
Interest expense [Abstract]
Cash interest expense	113,000
Non-cash amortization of debt discount	57,000
Amortization of debt costs	5,000
Total interest expense	$ 175,000