Shareholders' Equity (Tables)

12 Months Ended

Apr. 30, 2014

Summary of Changes in Outstanding Options

A summary of changes in outstanding options for the year ended April 30, 2014 is as follows:

	Number of Shares			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (years)		Aggregate Intrinsic Value
Outstanding at May 1, 2013		3,751,180		$	7.12
Granted		644,500			9.35
Exercised		(890,341	)		6.15
Forfeited/cancelled		(611,267	)		8.69
Outstanding at April 30, 2014		2,894,072		$	7.59		3.5	$	5,992,532
Exercisable at April 30, 2014		1,071,812		$	6.63		2.5	$	3,221,689

Fair Value of Option Award Estimated Using Black-Scholes Option Pricing Model

The fair value of each option award is estimated on the date of grant using the Black-Scholes option pricing model with the following weighted-average assumptions for the years ended April 30, 2014, 2013, and 2012:

	2014			2013			2012
Dividend yield		5.2	%		5.4	%		5.6	%
Expected volatility		55.1	%		56.0	%		55.4	%
Risk-free interest rate		2.3	%		2.4	%		2.7	%
Expected term		4.4 years			4.3 years			4.3 years