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Debt - 2016 Loan and Security Agreement (Details) - USD ($) | Aug. 01, 2016 | Jun. 30, 2018
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Line of Credit Facility [Line Items] |  |
Unrestricted cash required to be deposited with lenders |  | $ 25,000,000
Line of Credit | Loan and Security Agreement 2016 | Revolving Credit Facility |  |
Line of Credit Facility [Line Items] |  |
Credit facility, maximum borrowing capacity | $ 50,000,000 |
Unused line of credit capacity fee | 0.25% |
First and second anniversary fee for line of credit | $ 31,250 |
Prime Rate | Line of Credit | Loan and Security Agreement 2016 | Revolving Credit Facility |  |
Line of Credit Facility [Line Items] |  |
Debt instrument, basis spread | 0.50% |
Percentage increase in interest rate if adjusted EBITDA is negative at the end of the quarter | 0.25% |

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- Definition Line of Credit Facility, Covenant, Unrestricted Cash Amount Deposited With Lenders + References No definition available. + Details
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- Definition Line of Credit Facility, First and Second Anniversary Fee + References No definition available. + Details
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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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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility. + References No definition available. + Details
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