Subsequent Events - Additional Information (Detail) $ / shares in Units, $ in Thousands				1 Months Ended	12 Months Ended
	Jan. 26, 2018 USD ($)	Jan. 24, 2018 $ / shares shares	Jan. 04, 2018	Aug. 31, 2015 USD ($)	Dec. 31, 2016 shares
Subsequent Event [Line Items]
Proceeds from the issuance of common stock | $				$ 73,965
Common Stock [Member]
Subsequent Event [Line Items]
Shares issued					120,672
Subsequent Events [Member]
Subsequent Event [Line Items]
Reverse stock split, conversion ratio			0.25
Subsequent Events [Member] | Common Stock [Member] | Underwriting Agreement [Member]
Subsequent Event [Line Items]
Shares price per share | $ / shares		$ 13.25
Proceeds from the issuance of common stock | $	$ 78,778,000
Subsequent Events [Member] | Common Stock [Member] | Underwriters [Member] | Underwriting Agreement [Member]
Subsequent Event [Line Items]
Number of shares granted to purchase		825,000
Shares price per share | $ / shares		$ 12.455
Subsequent Events [Member] | Maximum [Member] | Common Stock [Member] | Underwriting Agreement [Member]
Subsequent Event [Line Items]
Shares issued		6,325,000
Subsequent Events [Member] | Inotek [Member]
Subsequent Event [Line Items]
Date of reverse merger			Jan. 04, 2018
Reverse stock split, description			1-for-4 reverse stock split
Reverse stock split, conversion ratio			0.25
Number of common stock converted for each outstanding share under merger agreement			76.185
Merger agreement, description			As a result of the reverse stock split, the per share exercise price of, and the number of shares of common stock underlying, Inotek’s stock options and warrants outstanding prior to the reverse stock split were automatically proportionally adjusted based on the 4-to-1 reverse stock split ratio in accordance with the terms of such options and warrants. The reverse stock split did not alter the par value of Inotek’s common stock or modify any voting rights or other terms of the common stock.
Subsequent Events [Member] | Inotek [Member] | Private Rocket [Member]
Subsequent Event [Line Items]
Number of common stock converted for each outstanding share under merger agreement			76.185