Acquisition and Disposition - Schedule of Selected Financial Data of the Company's Gain from Sale (Details) - USD ($)	9 Months Ended
	Jan. 31, 2018	Jan. 31, 2017
Net gain from sale of Dataram Memory business	$ 94,485
Dataram Memory [Member]
Total consideration	900,000
Direct legal and sales commission expenses related to the sale	(201,510)
Estimated Dataram's accrued expenses to be deducted from the sales proceeds	(174,880)
Total carrying value of Dataram Memory business on date of sale	(429,125)
Net gain from sale of Dataram Memory business	94,485
Current assets	3,271,426
Other assets	33,320
Current liabilities	(2,866,660)
Liabilities - long term	(8,961)
Total carrying value of Dataram Memory business on date of sale	$ 429,125