Summary of Significant Accounting Policies - Summary of option activity (Details) (USD $)	3 Months Ended
	Jul. 31, 2012		Apr. 30, 2012
Summary of option activity, Shares
Balance April 30, 2012	1,745,900
Granted	100,000
Exercised	0
Expired	0
Balance July 31, 2012	1,845,900
Exercisable July 31, 2012	1,397,400
Expected to vest July 31, 2012	1,754,000
Summary of option activity, Weighted average exercise price
Balance April 30, 2012	$ 2.34
Granted	$ 0.69
Balance July 31, 2012	$ 2.25
Exercisable July 31, 2012	$ 2.51
Expected to vest July 31, 2012	$ 2.25
Summary of option activity, Additional disclosures
Balance April 30, 2012, Weighted average remaining contractual life	5 years 18 days		5 years 3 months 14 days
Balance July 31, 2012, Weighted average remaining contractual life	5 years 18 days		5 years 3 months 14 days
Exercisable July 31, 2012,Weighted average remaining contractual life	5 years 4 days	[1]
Expected to vest July 31, 2012,Weighted average remaining contractual life	5 years 18 days	[1]
Balance April 30, 2012, Aggregate intrinsic value	$ 0	[2]
Balance July 31, 2012, Aggregate intrinsic value	0	[2]
Exercisable July 31, 2012, Aggregate intrinsic value	$ 0

[1] This amount represents the weighted average remaining contractual life of stock options in years.

[2] This amount represents the difference between the exercise price and $0.64, the closing price of Dataram common stock on July 31, 2012 as reported on the NASDAQ Stock Market, for all in-the-money options outstanding and all the in-the-money shares exercisable. There were nil in-the-money options at July 31, 2012.