Accounting for the Costs of Computer Software Developed for Internal Use (Detail Textuals) (USD $)	12 Months Ended
	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2012
Internal Use Software [Abstract]
Capitalized cost of development of software for internal use	$ 2,481,000	$ 2,457,000
Development costs for the digital production software project	2,416,000	2,326,000
Development costs related to a new fulfillment system	65,000	131,000
Internal costs to develop software	1,595,000	1,663,000
Third party programmers' costs	886,000	794,000
Expected useful life of the asset	5 years
Amortization expense	$ 1,812,000	$ 1,295,000	$ 446,000