Summary of Significant Accounting Policies (Tables) - Income Tax Rate (Details)	9 Months Ended
	Jan. 31, 2014	Jan. 31, 2013
Notes to Financial Statements
U.S. federal statutory tax rate	34.00%	34.00%
State income tax expense, net of Federal tax benefit	5.00%	5.00%
Adjustment for prior year estimates	(5.00%)	0.00%
Effect of graduated federal tax rates	(0.80%)	(5.30%)
Effective Tax Rate	33.20%	33.70%