Accounting for the Costs of Computer Software Developed for Internal Use (Detail Textuals) (Computer Software Developed For Internal Use, USD $)	3 Months Ended
	Jul. 31, 2013	Jul. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Capitalized cost of development of software for internal use	$ 586,000	$ 405,000
Development costs for digital production software project	574,000	354,000
Development costs related to new fulfillment system	12,000	51,000
Amortization expense	$ 402,000	$ 295,000
Minimum
Finite-Lived Intangible Assets [Line Items]
Expected useful life of asset	3 years
Maximum
Finite-Lived Intangible Assets [Line Items]
Expected useful life of asset	5 years