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Debt - Additional Information (Details) (USD $)
Share data in Thousands, except Per Share data, unless otherwise specified |
3 Months Ended | 0 Months Ended | ||||
|---|---|---|---|---|---|---|
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Mar. 31, 2015
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Mar. 31, 2014
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Jun. 30, 2014
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Dec. 31, 2014
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Dec. 31, 2013
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Aug. 11, 2014
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| Debt Instrument [Line Items] | ||||||
| Original principal amount | $ 24,298,000 | $ 24,500,000 | ||||
| Cash and cash equivalents | 14,882,000 | 13,257,000 | 18,247,000 | 2,279,000 | ||
| Loss on extinguishment of debt | 79,000 | 0 | ||||
| Hercules Term Loan | ||||||
| Debt Instrument [Line Items] | ||||||
| Original principal amount | 20,000,000 | 20,000,000 | 20,000,000 | |||
| Debt and line of credit maturity date | Jan. 01, 2018 | |||||
| Term loan fee amount | 200,000 | |||||
| Final payment fee for debt | 1,500,000 | |||||
| Termination fee | 1,200,000 | |||||
| Debt description | The Hercules Term Loan also includes a non-refundable final payment fee of $1.5 million. The final payment fee is being accrued and recorded to interest expense over the life of the loan. The Hercules Term Loan also has an early termination fee of $1.2 million if the loan is paid prior to July 1, 2015. | |||||
| Debt instrument, fixed rate | 10.95% | |||||
| Debt instrument, interest rate description | The Hercules Term Loan bears interest at the rate of the greater of either (i) the prime rate plus 7.7%, and (ii) 10.95%. | |||||
| Debt instrument, periodic payment, principal | 700,000 | |||||
| Term loan, payment terms | Interest accrues from the closing date of the loan and interest payments are due monthly. Principal payments are required commencing August 1, 2015 and are to be made in 30 equal installments of approximately $700,000, with the remainder due at maturity. | |||||
| Debt instrument, covenant description | The Hercules Term Loan contains certain covenants related to restrictions on payments to certain Company affiliates, financial reporting requirements and a minimum liquidity covenant that requires the Company to maintain cash and cash equivalents of not less than $9 million. | |||||
| Debt instrument, covenant compliance | Although the Company was in compliance with the liquidity covenant at March 31, 2015, the Company anticipates that it will be non-compliant with the liquidity covenant during the fourth quarter of 2015 if additional financing is not obtained, and has therefore classified the entire obligation as a current liability. | |||||
| Hercules Term Loan | Maximum | ||||||
| Debt Instrument [Line Items] | ||||||
| Number of installments for principal payments | 30 | |||||
| Hercules Term Loan | Minimum | ||||||
| Debt Instrument [Line Items] | ||||||
| Cash and cash equivalents | 9,000,000 | |||||
| Hercules Term Loan | Prime rate plus | ||||||
| Debt Instrument [Line Items] | ||||||
| Debt instrument, variable interest rate | 7.70% | |||||
| Conversion Feature of Note | ||||||
| Debt Instrument [Line Items] | ||||||
| Original principal amount | 2,900,000 | |||||
| Debt instrument purchase price | 798,000 | 2,500,000 | ||||
| Magna Additional Convertible Notes | ||||||
| Debt Instrument [Line Items] | ||||||
| Original principal amount | 3,500,000 | |||||
| Debt instrument purchase price | 3,500,000 | 3,500,000 | ||||
| Debt and line of credit maturity date | Aug. 11, 2016 | |||||
| Magna Convertible Notes | ||||||
| Debt Instrument [Line Items] | ||||||
| Original principal amount | 4,298,000 | 4,500,000 | ||||
| Debt and line of credit maturity date | Jun. 30, 2016 | |||||
| Debt instrument, fixed rate | 6.00% | |||||
| Debt instrument, interest rate description | The Initial Convertible Note and the Additional Convertible Note mature on June 30, 2016 and August 11, 2016, respectively, (subject to extension by the holder) and accrue interest at an annual rate of 6.0%. | |||||
| Common stock at a fixed conversion price | $ 3.75 | |||||
| Percentage of volume weighted average price | 80.00% | |||||
| Convertible notes | $ 202,000 | |||||
| Number of shares converted | 373 | |||||