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, 2012	Jul. 31, 2011
Finite-Lived Intangible Assets [Line Items]
Capitalized cost of development of software for internal use	$ 405,000	$ 1,557,000
Development costs for the digital production software project	354,000	1,283,000
Development costs related to a new fulfillment system	51,000	274,000
Amortization expense	$ 295,000	$ 66,000
Minimum
Finite-Lived Intangible Assets [Line Items]
Expected useful life of the asset	3 years
Maximum
Finite-Lived Intangible Assets [Line Items]
Expected useful life of the asset	5 years