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Debt - 2016 Loan and Security Agreement (Details) - USD ($)	Aug. 01, 2016	Jun. 30, 2018
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%

X

- Definition

Debt Instrument, Basis Spread on Variable Rate Increase

+ References

No definition available.

+ Details

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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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X

- Definition

Line of Credit Facility, First and Second Anniversary Fee

+ References

No definition available.

+ Details

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X

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ 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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X

- 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

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X

- 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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- Details

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