Debt	3 Months Ended
Mar. 31, 2014
Debt Disclosure [Abstract]
Debt	6. DEBT Equipment Notes Payable—The Company’s loan and security agreement (the “2008 Loan Agreement”) was amended in May 2009 to include a $2.0 million equipment line of credit (the “Loan”). Borrowings under the Loan could be made for eligible equipment purchases through December 31, 2009. The Loan was again amended in April 2010, June 2011, June 2012 and June 2013, which increased the available borrowings by an additional $4.0 million, $4.0 million, $3.0 million and $3.0 million, respectively. Each advance under the Loan is payable in 36 equal monthly payments of principal, plus accrued interest, at an annual rate of 3.75%. The last payment on the Loan is due June 1, 2016. The 2008 Loan Agreement is secured by substantially all of the Company’s assets, except its intellectual property. At March 31, 2014 and December 31, 2013, the outstanding balance under the Loan was $2.7 million and $3.3 million, respectively. As of March 31, 2014, the Company had $1.6 million of available borrowings under the Loan for eligible equipment purchases through April 30, 2014. Software Financing—In May 2012, the Company entered into a $1.8 million agreement to finance the purchase of a perpetual software license and the related first year technical support (the “Software Finance Agreement”). The Software Finance Agreement had been secured by the financed assets. The financed amount was due in 12 equal quarterly payments of principal, plus accrued interest, at an annual rate of 5.40% through April 1, 2015. In May 2013, the Company renewed the related technical support for a second year, increasing the financed amount by $0.6 million. In February 2014, the Company paid the outstanding balance under the Software Finance Agreement in full. At March 31, 2014 and December 31, 2013, the outstanding balance under the Software Finance Agreement was zero and $0.9 million, respectively.

6. DEBT

Equipment Notes Payable—The Company’s loan and security agreement (the “2008 Loan Agreement”) was amended in May 2009 to include a $2.0 million equipment line of credit (the “Loan”). Borrowings under the Loan could be made for eligible equipment purchases through December 31, 2009. The Loan was again amended in April 2010, June 2011, June 2012 and June 2013, which increased the available borrowings by an additional $4.0 million, $4.0 million, $3.0 million and $3.0 million, respectively. Each advance under the Loan is payable in 36 equal monthly payments of principal, plus accrued interest, at an annual rate of 3.75%. The last payment on the Loan is due June 1, 2016. The 2008 Loan Agreement is secured by substantially all of the Company’s assets, except its intellectual property.

At March 31, 2014 and December 31, 2013, the outstanding balance under the Loan was $2.7 million and $3.3 million, respectively. As of March 31, 2014, the Company had $1.6 million of available borrowings under the Loan for eligible equipment purchases through April 30, 2014.

Software Financing—In May 2012, the Company entered into a $1.8 million agreement to finance the purchase of a perpetual software license and the related first year technical support (the “Software Finance Agreement”). The Software Finance Agreement had been secured by the financed assets. The financed amount was due in 12 equal quarterly payments of principal, plus accrued interest, at an annual rate of 5.40% through April 1, 2015. In May 2013, the Company renewed the related technical support for a second year, increasing the financed amount by $0.6 million. In February 2014, the Company paid the outstanding balance under the Software Finance Agreement in full. At March 31, 2014 and December 31, 2013, the outstanding balance under the Software Finance Agreement was zero and $0.9 million, respectively.