Stockholders' Equity - Additional Information (Detail) $ / shares in Units, $ in Millions	1 Months Ended	9 Months Ended
	Mar. 31, 2016 USD ($) $ / shares	Sep. 30, 2016 $ / shares shares	Nov. 08, 2016 shares	Sep. 06, 2016 $ / shares shares
Stockholders Equity [Line Items]
Warrants issued to acquire common stock				1,917,342
Exercise price of warrants for common stock | $ / shares		$ 0.01		$ 0.01
Warrants exercised		877,026
Warrants outstanding		1,040,316
Authorized common stock approved by stockholders		50,000,000
Number of consecutive trading-day period	30 days
Reverse share split		0.2
Reverse share split description		a one-for-five (1:5) reverse split
NYSE Minimum Criteria
Stockholders Equity [Line Items]
Average stock price per share | $ / shares	$ 1.00
Average market capitalization | $	$ 50.0
Subsequent Event | Special Stockholders Meeting
Stockholders Equity [Line Items]
Authorized common stock approved by stockholders			75,000,000
Authorizing issuance of additional stock approved by stockholders			46,444,212
Shares approved for future awards by stockholders			2,500,000