Consolidated Balance Sheets (Parenthetical) (USD $)	Jul. 31, 2014	Apr. 30, 2014
Consolidated Balance Sheets [Abstract]
Accounts receivable, Allowance for doubtful accounts	$ 150,000	$ 150,000
Intangible assets, Amortization	$ 3,410,760	$ 3,309,246
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	500,000	500,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	12,000,000	12,000,000
Common stock, shares issued	4,040,807	4,012,319
Common stock, shares outstanding	4,040,807	4,012,319