Related-Party Transactions - Additional Information (Detail) - USD ($)	1 Months Ended
	Feb. 29, 2012	Sep. 30, 2015	Dec. 31, 2014
Related Party Transaction [Line Items]
Warrant contractual term	10 years
Purchase of warrant common stock	150,000
Warrants to purchase common stock, exercise price	$ 20.00
Accounts payable balance		$ 615,000	$ 748,000
Bio-Techne [Member]
Related Party Transaction [Line Items]
Warrant contractual term	10 years
Purchase of warrant common stock	150,000
Warrants to purchase common stock, exercise price	$ 20.00
Warrant common stock exercise price rate	200.00%
Accounts payable balance		$ 16,930	$ 1,150