Stockholders' Equity - Additional Information (Details) - USD ($)					1 Months Ended								3 Months Ended	12 Months Ended
	Jun. 02, 2016	Apr. 06, 2015	Feb. 10, 2015	Oct. 06, 2014	Nov. 28, 2016	Jun. 29, 2016	Apr. 17, 2015	Mar. 19, 2015	Jul. 31, 2014	Jul. 11, 2014	Jan. 31, 2014	May 19, 2011	Sep. 30, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 30, 2015	Jul. 10, 2014	Feb. 28, 2014
Stockholders Equity Note [Line Items]
Fair value of options assumed										$ 758,948				$ 0	$ 0	$ 758,948
Issuance of Stock and Warrants for Services or Claims														$ 0	$ 0	679,447
Preferred Stock, Shares Outstanding														0	0
Proceeds From Issuance Initial Public Offering														$ 0	$ 81,014,989	$ 16,725,946
Initial Public Offering Value Of Shares Authorized																	$ 150,000,000
Common Stock Par Or Stated Value Per Share														$ 0.001	$ 0.001
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition														1 year 8 months 12 days
Warrant [Member]
Stockholders Equity Note [Line Items]
Stock Issued During Period, Shares, New Issues							88,293
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term														3 years 4 months 24 days
Issuance of Stock and Warrants for Services or Claims													$ 679,447
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period							120,265						120,265
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Expirations															133,587
Series A Preferred Stock [Member]
Stockholders Equity Note [Line Items]
Preferred Stock, Shares Outstanding																			44,000
Convertible Preferred Stock, Shares Issued upon Conversion																			440,000
Assembly Pharmaceuticals, Inc [Member]
Stockholders Equity Note [Line Items]
Fair value of options assumed										$ 758,948
Amended And Restated 2014 Plan [Member]
Stockholders Equity Note [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized														32,501
Common Stock [Member]
Stockholders Equity Note [Line Items]
Net proceeds raised from common stock issued in a public offering		$ 10,600,000		$ 15,000,000				$ 70,400,000
Stock Issued During Period, Value, New Issues											$ 1,800,000
Stock Issued During Period, Shares, New Issues		833,333		1,959,000				5,555,555			92,472
Stock Issued During Period, Shares, Conversion of Convertible Securities										4,008,848
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number										621,651
Stockholders' Equity, Reverse Stock Split										1-for-5 reverse stock split
Sale of Stock, Price Per Share											$ 19.07
Stock Issued During Period Shares In Exchange For Restricted Stock Units									25,000							25,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period														21,200	76,422
Common Stock Par Or Stated Value Per Share																		$ 0.001
Share Price										$ 1.45
Stock Redeemed or Called During Period, Shares						108
Underwritten Public Offering [Member] | Common Stock [Member]
Stockholders Equity Note [Line Items]
Stock Issued During Period, Value, New Issues		$ 10,600,000
Stock Issued During Period, Shares, New Issues		833,333
Sale of Stock, Price Per Share		$ 13.50
Proceeds From Issuance Initial Public Offering		$ 81,000,000
Underwriters [Member] | Common Stock [Member]
Stockholders Equity Note [Line Items]
Stock Issued During Period, Shares, New Issues								833,333
Dr Ellison [Member]
Stockholders Equity Note [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested Options Forfeited, Number of Shares			266,666
Accelerated Options			266,667
Investors [Member]
Stockholders Equity Note [Line Items]
Net proceeds raised from common stock issued in a public offering				$ 15,000,000
Stock Issued During Period, Shares, New Issues				1,959,000
Sale of Stock, Price Per Share				$ 8.04
Percentage Of Placement Agent Fee				5.00%
Investors [Member] | Common Stock [Member]
Stockholders Equity Note [Line Items]
Stock Issued During Period, Value, New Issues								$ 70,400,000
Stock Issued During Period, Shares, New Issues								5,555,555
Sale of Stock, Price Per Share								$ 13.50
Dr. Arnold [Member]
Stockholders Equity Note [Line Items]
Accelerated Options					21,585
Maximum [Member]
Stockholders Equity Note [Line Items]
Fair Value Assumptions, Expected Volatility Rate										102.80%
Fair Value Assumptions, Risk Free Interest Rate										2.15%
Fair Value Assumptions, Expected Term										6 years 1 month 6 days
Minimum [Member]
Stockholders Equity Note [Line Items]
Fair Value Assumptions, Expected Volatility Rate										97.33%
Fair Value Assumptions, Risk Free Interest Rate										1.66%
Fair Value Assumptions, Expected Term										5 years
2010 Stock Incentive Plan [Member]
Stockholders Equity Note [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number														702,959
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized												300,000
2014 Stock Incentive Plan [Member]
Stockholders Equity Note [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number														3,132,641
Common Stock, Capital Shares Reserved for Future Issuance	4,160,000
Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Grants In Period, Gross														934,070
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized	1,600,000