Organization and Summary of Significant Accounting Policies - Additional Information (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	0 Months Ended
	May 22, 2014	Sep. 30, 2014	Dec. 31, 2013
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Reverse stock split, conversion ratio	0.1
Stock issued during period, Shares, Stock splits	80
Decrease in stock issued during period shares stock splits	8
Common stock, par value	$ 0.001	$ 0.001	$ 0.001