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Debt - Narrative (Details) $ / shares in Units, $ in Thousands |  |  | 6 Months Ended |
--- | --- | --- | --- | ---
Jun. 10, 2015 USD ($) trading_day $ / shares | Oct. 31, 2014 USD ($) | Jun. 30, 2015 USD ($) | Dec. 31, 2014 USD ($)
Debt Instrument [Line Items] |  |  |  |
Conversion rate | 0.2 |  |  |
Conversion price ($ per share) | $ / shares | $ 5.00 |  |  |
Repurchase price | 100.00% |  |  |
Remaining discount amortization period | 5 years |  |  |
Stock Price Exceeds 130% of Conversion Price |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Threshold of trading days | trading_day | 20 |  |  |
Threshold of consecutive trading days | 30 days |  |  |
Threshold percentage of stock price trigger | 130.00% |  |  |
Debt Trading Price Below Product of Stock Price and Conversion Rate |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Threshold of consecutive trading days | 5 days |  |  |
Threshold percentage of stock price trigger | 98.00% |  |  |
Stock Price Exceeds 140% of Conversion Price |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Threshold of trading days | trading_day | 20 |  |  |
Threshold of consecutive trading days | 30 days |  |  |
Threshold percentage of stock price trigger | 140.00% |  |  |
Repurchase price | 100.00% |  |  |
Convertible Debt |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Term of debt instrument | 5 years |  |  |
Principal | $ 120,000 |  | $ 120,000 |
Debt issuance costs | $ 3,900 |  |  |
Stated interest rate of debt issued | 5.50% |  |  |
Minimum principal needed to call debt | 25.00% |  |  |
Redemption of principal | 100.00% |  |  |
Company elected remedy in default | 60 days |  |  |
Interest for company elected remedy for default | 0.50% |  |  |
Issuance cost allocated to equity | $ 1,300 |  |  |
Issuance cost allocated to liability | $ 2,600 |  |  |
Long-term debt |  |  | $ 78,238 |
Effective interest rate |  |  | 7.90% |
Convertible Debt | Debt Trading Price Below Product of Stock Price and Conversion Rate |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Number of consecutive business days | 5 days |  |  |
Accrued Liabilities | Convertible Debt |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt issuance costs | $ 400 |  |  |
Revolving Credit Facility |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Term of debt instrument |  | 5 years |  |
Maximum amount of credit facility |  | $ 25,000 |  |
Outstanding borrowings under the credit facility |  |  | $ 0 | $ 5,200
Available borrowings |  |  | $ 24,000 |
Revolving Credit Facility | Minimum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Margin on LIBOR rate |  |  | 2.50% |
Revolving Credit Facility | Maximum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Margin on LIBOR rate |  |  | 3.00% |
Letter of Credit |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maximum amount of credit facility |  | $ 3,000 |  |

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- Definition Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 + Details
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