Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - Stock Option Activity (Detail)

v3.7.0.1
Stockholders' Equity - Stock Option Activity (Detail) - $ / shares
12 Months Ended
Jan. 31, 2017
Jan. 31, 2016
Jan. 31, 2015
Equity [Abstract]      
Shares, Outstanding at beginning of period 1,192,677 1,626,421 1,502,176
Shares, Granted 1,581,614 612,678 500,000
Shares, Exercised 0 (28,740) 0
Shares, Forfeited/expired/cancelled (632,724) (1,017,682) (375,755)
Shares, Outstanding at end of period 2,141,567 1,192,677 1,626,421
Shares, Options exercisable at end of period 203,982 80,000 1,108,115
Weighted average exercise price, Outstanding at beginning of period $ 6.80 $ 7.77 $ 9.77
Weighted average exercise price, Granted 4.02 6.44 7.23
Weighted average exercise price, Exercised   6.74  
Weighted average exercise price, Forfeited/expired/cancelled 6.98 8.13 15.06
Weighted average exercise price, Outstanding at end of period 4.70 6.80 7.77
Weighted average exercise price, Options exercisable at end of period $ 6.28 $ 6.83 $ 8.02
Weighted average exercise price, Weighted average remaining contractual term (in years) 8 years 4 days 8 years 1 month 6 days 4 years 8 months 19 days