Summary of Significant Accounting Policies - Additional Information (Details)	1 Months Ended	12 Months Ended
	Oct. 31, 2015	Dec. 31, 2016 USD ($) Segment	Dec. 31, 2015 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Number of reportable and operating segment | Segment		1
Property plant and equipment basis of valuation		cost
Property plant and equipment depreciation methods		the straight-line method over the estimated useful lives of the assets
Impairment of long-lived assets		$ 0
Deferred offering cots		0	$ 0
Proceeds from issuance of common stock during IPO, net of underwriting discounts and commissions excluding offering costs			58,200,000
Proceeds from issuance of common stock during follow-on public offering, net of underwriting discounts and commissions		$ 61,600,000
Reverse split ratio of shares of issued and outstanding common stock	0.00272
Reverse stock split effective date		Oct. 23, 2015
IPO
Summary Of Significant Accounting Policies [Line Items]
Deferred offering cots			$ 2,500,000
Follow-on Offering
Summary Of Significant Accounting Policies [Line Items]
Deferred offering cots		$ 508,000
Minimum
Summary Of Significant Accounting Policies [Line Items]
Property plant and equipment useful life		2 years
Maximum
Summary Of Significant Accounting Policies [Line Items]
Property plant and equipment useful life		5 years
Leasehold improvements
Summary Of Significant Accounting Policies [Line Items]
Property plant and equipment estimated useful lives		shorter of their estimated useful lives or the related lease term