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Summary of Significant Accounting Policies - Binomial Model Assumptions to Estimate Fair Value of Warrant Liabilities (Details) - $ / shares |  | 12 Months Ended
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Apr. 01, 2016 | Dec. 31, 2016
Accounting Policies [Abstract] |  |
Risk-free rate of return |  | 2.90%
Vesting date | Apr. 01, 2016 | Apr. 01, 2016
Maturity date |  | Dec. 31, 2021
Estimated volatility rate |  | 70.00%
Exercise price |  | $ 2.16
Fair value of underlying preferred shares |  | $ 9.84

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- Definition Agreed upon price for the exchange of the underlying asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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