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Stock Options and Awards (Detail) - Summary data of nonvested stock award activity - USD ($)
$ / shares in Units, $ in Thousands
 6 Months Ended 12 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Sep. 30, 2016
Sep. 30, 2015
Summary data of nonvested stock award activity [Abstract]        
Nonvested shares outstanding, number of nonvested shares     130,457 149,375
Nonvested shares outstanding, weighted average grant date fair value (in Dollars per share)     $ 6.08 $ 6.92
Nonvested shares outstanding, weighted average remaining contractual term 2 years 1 month 13 days 2 years 5 months 12 days 2 years 74 days  
Nonvested shares outstanding, aggregate intrinsic value (in Dollars)     $ 714 $ 1,191
Activity in 2015:        
Granted, number of nonvested shares     105,395 57,500
Granted, weighted average grant date fair value (in Dollars per share)     $ 6.47 $ 5.05
Vested, number of nonvested shares     (48,444) (58,296)
Vested, weighted average grant date fair value (in Dollars per share)     $ 6.33 $ 6.82
Forfeited, number of nonvested shares     (21,700) (18,122)
Forfeited, weighted average grant date fair valuem (in Dollars per share)     $ 7.38 $ 7.38
Activity in 2016:        
Vested at September 30, 2016     179,277  
Vested at September 30, 2013 (in Dollars per share)     $ 5.57  
Vested at September 30, 2016     130 days  
Vested at September 30, 2013 (in Dollars)     $ 1,834  
Vested and expected to vest at September 30, 2016     344,985  
Vested and expected to vest at September 30, 2013 (in Dollars per share)     $ 5.96  
Vested and expected to vest at September 30, 2016     1 year 89 days  
Vested and expected to vest at September 30, 2013 (in Dollars)     $ 3,529  
Nonvested shares outstanding, number of nonvested shares     165,708 130,457
Nonvested shares outstanding, weighted average grant date fair value (in Dollars per share)     $ 6.38 $ 6.08
Nonvested shares outstanding, aggregate intrinsic value (in Dollars)     $ 1,695 $ 714