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Cash and Cash Equivalents (Details) | Dec. 31, 2016 lender | Dec. 31, 2015 USD ($) | Mar. 31, 2013 USD ($)
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Cash and Cash Equivalents |  |  |
Number of lenders | lender | 2 |  |
2013 Loan and Security Agreement | Revolving Credit Facility |  |  |
Cash and Cash Equivalents |  |  |
Covenant terms, minimum required cash on deposit at lender | $ |  | $ 7,500,000.0 | $ 7,500,000.0

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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- Details
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