XML 23 R47.htm IDEA: XBRL DOCUMENT v2.4.0.6
Stockholders' Equity (Details 4) (RSUs and PSUs [Member], USD $)
6 Months Ended
Oct. 31, 2012
Oct. 31, 2011
RSUs and PSUs [Member]
   
Summary of activity in unvested restricted stock units and performance share units    
Restricted Stock Units, RSUs and PSUs outstanding, beginning of period 384,140 123,600
Weighted Average Grant Date Fair Value, RSUs and PSUs outstanding, beginning of period $ 7.91 $ 5.27
Restricted Stock Units, Awarded 90,050 95,200
Weighted Average Grant Date Fair Value, Awarded $ 9.67 $ 4.76
Restricted Stock Units, Vested (7,667) (1,000)
Weighted Average Grant Date Fair Value, Vested $ 8.11 $ 5.21
Restricted Stock Units, Forfeited (47,331) (88,700)
Weighted Average Grant Date Fair Value, Forfeited $ 5.84 $ 5.30
Restricted Stock Units, RSUs and PSUs outstanding, end of period 419,192 129,100
Weighted Average Grant Date Fair Value, RSUs and PSUs outstanding, end of period $ 8.06 $ 6.00