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Assets and Liabilities Measured at Fair Value (Tables)
 9 Months Ended
Sep. 30, 2012
Assets and Liabilities Measured at Fair Value [Abstract]  
Schedule of fair value of the Warrants
The $3.4 million in proceeds allocated to the 2012 Warrants and the $2.2 million in proceeds allocated to the 2009 Warrants are classified as derivative instrument liabilities. The terms of the warrants provide for potential adjustment in the exercise price and are therefore considered to be derivative instrument liabilities that are subject to mark-to-market adjustment each period. As a result, for the nine month period ended September 30, 2012, the Company recorded pre-tax derivative instrument income of $1.0 million. The resulting derivative instrument liabilities totaled $4.6 million at September 30, 2012. Management expects that the warrants will either be exercised or expire worthless. The fair value of the Warrants at September 30, 2012 was determined by using an option pricing model assuming the following:
 
 
2012 Warrants
2009 Warrants
Expected volatility
83.54
%
85.83
%
Risk-free interest rates
0.28
%
0.21
%
Expected life (in years)
2.7
1.7
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets and Liabilities Measured at Fair Value on a Recurring Basis at September 30, 2012
(in thousands)

Level 1
Level 2
Level 3
Balance at
September 30, 2012
Assets
 
 
 
 
Money market funds
$
1,967
-
-
$
1,967
Total Assets
$
1,967
-
-
$
1,967
Liabilities
Warrant liability
$
-
-
$
4,561
$
4,561
Total Liabilities
$
-
-
$
4,561
$
4,561
Fair Value Measurements Using Significant Unobservable Inputs
Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
(in thousands)

Warrant Liability
Beginning balance
$
2,439
Total change in the fair value of the liability included in earnings
(1,025
)
Fair value of warrants issued
4,055
 Fair value of warrants exercised or expired
(908
) 
Ending balance
$
4,561