Stockholders' Equity - Schedule of Stockholders' Equity Note, Warrants or Rights (Details)	3 Months Ended
	Jul. 31, 2016 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Number of Warrants
Warrants outstanding, beginning of period | shares	207,625
Warrants, issued | shares	0
Warrants, expired | shares	(73,958)
Warrants outstanding, end of period | shares	133,667
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Weighted Average Grant Date Fair Value
Warrants, weighted average exercise price outstanding, beginning of period | $ / shares	$ 19.74
Warrants, weighted average exercise price, issued | $ / shares	0
Warrants, weighted average exercise price, expired | $ / shares	40.68
Warrants, weighted average exercise price outstanding, end of period | $ / shares	$ 8.15
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures
Warrants, weighted average remaining contractual term, beginning of period	1 year 3 months
Warrants, weighted average remaining contractual term, end of period	2 years 4 months
Warrants, aggregate intrinsic value, outstanding, beginning of period | $	$ 0	[1]
Warrants, aggregate intrinsic value, issued | $	0	[1]
Warrants, aggregate intrinsic value, outstanding, end of period | $	$ 0	[1]

[1] This amount represents the difference between the conversion price and $1.80, the closing price of Dataram common stock on July 29, 2016 as reported on the NASDAQ Stock Market, for all in-the-money warrants outstanding.