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Stock Incentive Plan - Fair Value Assumptions (Details) - Level 3 - Fair Value, Recurring - Warrants to the Lenders Under the Loan Agreement $ in Thousands	Apr. 03, 2017 USD ($) $ / shares
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Expected term of warrants (in years)	5 years
Total fair value | $	$ 3,500
Stock price at grant date
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants outstanding, measurement input	8.88
Exercise option price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants outstanding, measurement input	10.25
Expected volatility rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants outstanding, measurement input	0.4829
Risk-free rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants outstanding, measurement input	0.0188
Expected dividend yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants outstanding, measurement input	0

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Value of input used to measure outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258

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