Quarterly report pursuant to Section 13 or 15(d)

Assumptions used in Estimating Fair Value of Warrant Derivative Liability (Detail)

v3.6.0.2
Assumptions used in Estimating Fair Value of Warrant Derivative Liability (Detail) - $ / shares
6 Months Ended
Sep. 15, 2016
Nov. 30, 2016
Derivative [Line Items]    
Fair value of underlying stock $ 0.78 $ 0.67
Risk free rate 1.20% 1.81%
Expected term (in years) 5 years 4 years 9 months 15 days
Stock price volatility 106.00% 103.00%
Expected dividend yield 0.00% 0.00%
Probability of Fundamental Transaction 50.00% 50.00%
Probability of holder requesting cash payment 50.00% 50.00%