Warrants Outstanding (Detail) - 6 months ended Jun. 30, 2015 - $ / shares	Total
Share-Based Compensation [Line Items]
Number of Shares Issuable	989,970
Weighted-Average Exercise Price	$ 1.16
10% convertible preferred stock - warrants
Share-Based Compensation [Line Items]
Number of Shares Issuable	580,000
Weighted-Average Exercise Price	$ 1.00
Consultants
Share-Based Compensation [Line Items]
Number of Shares Issuable	409,970
Weighted-Average Exercise Price	$ 1.39