XML 76 R62.htm IDEA: XBRL DOCUMENT v3.8.0.1
Stock Option Plan and Stock Based Compensation - Stock Option Activity (Detail) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Feb. 28, 2018
Feb. 28, 2017
Feb. 29, 2016
Feb. 28, 2015
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]        
Number of Shares, Options Outstanding, Beginning Balance 172,496 370,949 374,823  
Number of Shares, Granted 0 0 43,426  
Number of Shares, Terminated   (5,000) (47,300)  
Number of Shares, Exercised   (193,453)    
Number of Shares, Options Outstanding, Ending Balance 172,496 172,496 370,949 374,823
Number of Shares, Exercisable 170,880      
Weighted Average Exercise Price, Beginning Balance $ 15.95 $ 15.38 $ 15.95  
Weighted Average Exercise Price, Granted     13.69  
Weighted Average Exercise Price, Terminated   8.94 18.31  
Weighted Average Exercise Price, Exercised   15.04    
Weighted Average Exercise Price, Ending Balance 15.95 $ 15.95 $ 15.38 $ 15.95
Weighted Average Exercise Price, Exercisable $ 15.97      
Weighted Average Remaining Contractual Life (in years) 3 years 2 months 12 days 4 years 2 months 12 days 5 years 10 months 24 days 5 years 8 months 12 days
Weighted Average Remaining Contractual Life, Exercisable 3 years 2 months 12 days      
Aggregate Intrinsic Value $ 612 $ 223 $ 1,616 $ 210
Aggregate Intrinsic Value, Exercisable $ 602