Equity Transactions - Additional Information (Detail) $ / shares in Units, $ in Millions	Aug. 15, 2014 USD ($) $ / shares shares
Class of Stock [Line Items]
Gross proceeds before deduction commissions and other expenses	$ 5.6
Offering cost related to the transaction	0.4
Cash from issuance of common stock, net of offering costs	$ 5.2
Private Placement [Member]
Class of Stock [Line Items]
Common stock, issued and sold to investors | shares	6,845,830
Common stock, price per share | $ / shares	$ 0.816
Commission	$ 0.2
Legal and other expenses	$ 0.2