Credit Facilities	3 Months Ended
Mar. 31, 2013
Line of Credit Facility [Abstract]
Credit Facilities	Credit Facilities In October 2009, the Company entered into a revolving credit facility with Wells Fargo Bank (“Wells”), which was last amended on March 20, 2013, whereby the Company may borrow up to $20.0 million, subject to the calculation and limitation of a borrowing base (the “Wells Credit Facility”). All amounts owing under the Wells Credit Facility, of which there was $0 as of March 31, 2013, will become due and payable upon its expiration on May 15, 2013. The Company is presently working with Wells to extend the maturity to November 2014. As of March 31, 2013, the Company did not have any outstanding borrowings under the Wells Credit Facility. Any outstanding amounts under the Wells Credit Facility bear interest at a variable rate equal to the Wells prime rate, plus 1.00%, which is payable on a monthly basis. The Wells Credit Facility carried a 0.2% unused commitment fee though May 19, 2012, when this fee was eliminated. The Wells Credit Facility is collateralized by all of the Company's assets, except its intellectual property. The Wells Credit Facility contains certain financial covenants that were suspended by Wells for the three months ended March 31, 2013, in anticipation of the May 2013 amendment. The Wells Credit Facility also contains a “material adverse change” clause (“MAC”). If the Company encounters difficulties that would qualify as a MAC in its (i) operations, (ii) condition (financial or otherwise), or (iii) ability to repay amounts outstanding under the Wells Credit Facility, it could be canceled at Wells' sole discretion. Wells could then elect to declare the indebtedness, together with accrued interest and other fees, to be immediately due and payable and proceed against any collateral securing such indebtedness.

Credit Facilities

In October 2009, the Company entered into a revolving credit facility with Wells Fargo Bank (“Wells”), which was last amended on March 20, 2013, whereby the Company may borrow up to $20.0 million, subject to the calculation and limitation of a borrowing base (the “Wells Credit Facility”). All amounts owing under the Wells Credit Facility, of which there was $0 as of March 31, 2013, will become due and payable upon its expiration on May 15, 2013. The Company is presently working with Wells to extend the maturity to November 2014.

As of March 31, 2013, the Company did not have any outstanding borrowings under the Wells Credit Facility. Any outstanding amounts under the Wells Credit Facility bear interest at a variable rate equal to the Wells prime rate, plus 1.00%, which is payable on a monthly basis. The Wells Credit Facility carried a 0.2% unused commitment fee though May 19, 2012, when this fee was eliminated. The Wells Credit Facility is collateralized by all of the Company's assets, except its intellectual property.

The Wells Credit Facility contains certain financial covenants that were suspended by Wells for the three months ended March 31, 2013, in anticipation of the May 2013 amendment.

The Wells Credit Facility also contains a “material adverse change” clause (“MAC”). If the Company encounters difficulties that would qualify as a MAC in its (i) operations, (ii) condition (financial or otherwise), or (iii) ability to repay amounts outstanding under the Wells Credit Facility, it could be canceled at Wells' sole discretion. Wells could then elect to declare the indebtedness, together with accrued interest and other fees, to be immediately due and payable and proceed against any collateral securing such indebtedness.