Accounting for the Costs of Computer Software Developed for Internal Use (Detail Textuals) - USD ($)	9 Months Ended
	Jan. 31, 2016	Jan. 31, 2015
Internal Use Software [Abstract]
Capitalized cost of development of software for internal use	$ 1,337,000	$ 1,802,000
Internal costs to develop software	975,000	1,195,000
Third party programmers' costs	$ 362,000	607,000
Expected useful life of asset	5 years
Amortization expense	$ 1,985,000	$ 1,683,000