Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - Stock Option Activity (Detail)

v3.3.1.900
Stockholders' Equity - Stock Option Activity (Detail) - $ / shares
12 Months Ended
Jan. 31, 2016
Jan. 31, 2015
Jan. 31, 2014
Equity [Abstract]      
Shares, Outstanding at beginning of period 1,626,421 1,502,176 1,917,448
Shares, Granted 612,678 500,000 12,500
Shares, Exercised (28,740) 0 (118,528)
Shares, Forfeited/expired/cancelled (1,017,682) (375,755) (309,244)
Shares, Outstanding at end of period 1,192,677 1,626,421 1,502,176
Shares, Options exercisable at end of period 80,000 1,108,115 1,440,521
Weighted average exercise price, Outstanding at beginning of period $ 7.77 $ 9.77 $ 10.35
Weighted average exercise price, Granted 6.44 7.23 10.10
Weighted average exercise price, Exercised 6.74   9.10
Weighted average exercise price, Forfeited/expired/cancelled 8.13 15.06 13.78
Weighted average exercise price, Outstanding at end of period 6.80 7.77 9.77
Weighted average exercise price, Options exercisable at end of period $ 6.83 $ 8.02 $ 9.90
Weighted average exercise price, Weighted average remaining contractual term (in years) 8 years 1 month 6 days 4 years 8 months 19 days 3 years 11 months 5 days