Supplemental Disclosure for Statements of Cash Flows	6 Months Ended
Supplemental Disclosure for Statements of Cash Flows	Jun. 30, 2014
Supplemental Cash Flow Elements [Abstract]
Supplemental Disclosure for Statements of Cash Flows	Supplemental Disclosure for Statements of Cash Flows During the six-month periods ended June 30, 2014 and 2013, we paid interest aggregating $1.4 million and $607,000, respectively. During the six-month periods ended June 30, 2014 and 2013, we issued 36,455 and 22,126 shares of our common stock, respectively, as matching contributions to our 401(k) plan. In connection with entering into the Oxford Loan Agreement, we issued warrants with an estimated relative fair value of $465,000. In conjunction with the GECC Loan Agreement, we issued warrants with a fair value of $631,000.