Acquisition (Details Narrative) (USD $)	3 Months Ended		9 Months Ended		1 Months Ended
	Jan. 31, 2013	Jan. 31, 2012	Jan. 31, 2013	Jan. 31, 2012	Mar. 31, 2009 Acquisition of Certain MMB Assets
Acquisition (Textual) [Abstract]
Description of contingent consideration payable for acquisition of assets					Under the terms of the agreement with MMB, the remaining portion of the purchase price is contingently payable based upon the performance of the new Dataram business unit to be operated as a result of the acquisition of the ("MMB business unit") and consists of a percentage, averaging 65%, payable quarterly, over the subsequent four years from acquisition date of earnings before interest, taxes, depreciation and amortization of the MMB business unit.
Contingent consideration recognised during perion for acquisition of assets	$ 69,000	$ 66,000	$ 211,000