Stock Purchase Warrants - Schedule of Equity Classified Warrants Outstanding (Detail)	Sep. 30, 2015 $ / shares shares
Class of Warrant or Right [Line Items]
EXERCISE PRICE PER SHARE	$ 0.05
March 2016 | Common stock
Class of Warrant or Right [Line Items]
NUMBER OF UNDERLYING SHARES | shares	2,006
EXERCISE PRICE PER SHARE	$ 5.00
February 2019 | Common stock
Class of Warrant or Right [Line Items]
NUMBER OF UNDERLYING SHARES | shares	75,000
EXERCISE PRICE PER SHARE	$ 5.00
November 2019 | Common stock
Class of Warrant or Right [Line Items]
NUMBER OF UNDERLYING SHARES | shares	75,000
EXERCISE PRICE PER SHARE	$ 5.00
August 2020 | Common stock
Class of Warrant or Right [Line Items]
NUMBER OF UNDERLYING SHARES | shares	7,500
EXERCISE PRICE PER SHARE	$ 5.00
December 2019 | Common stock
Class of Warrant or Right [Line Items]
NUMBER OF UNDERLYING SHARES | shares	223,483
EXERCISE PRICE PER SHARE	$ 0.05