Description of Business and Significant Accounting Policies - Common Stock Repurchases (Details Narrative) (USD $)	12 Months Ended	3 Months Ended	12 Months Ended
	Apr. 30, 2013	Jul. 31, 2012 Common Stock Repurchase Plan	Apr. 30, 2012 Common Stock Repurchase Plan	Jan. 31, 2014 Common Stock Repurchase Plan	Apr. 10, 2012 Common Stock Repurchase Plan	Dec. 04, 2002 Common Stock Repurchase Plan
Number of shares authorized to repurchase					138,000	83,333
Number of common shares repurchased		22,942	7,315	0
Cost to repurchase common stock		$ 142,262	$ 45,299
Treasury shares canceled	22,942		7,315
Total number of shares authorized for purchase				136,408	166,667