Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Stock-Based Compensation - Summary of option activity (Details)

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Summary of Significant Accounting Policies - Stock-Based Compensation - Summary of option activity (Details)
3 Months Ended 12 Months Ended
Jul. 31, 2009
shares
Apr. 30, 2015
USD ($)
integer
$ / shares
shares
Apr. 30, 2014
USD ($)
$ / shares
shares
Summary of option activity, Shares      
Beginning Balance (in shares) | shares   264,244  
Granted | shares 8,333    
Exercised | shares      
Expired | shares   (138,498)  
Ending balance (in shares) | shares   125,746 264,244
Exercisable April 30, 2015 | shares   125,746  
Vested April 30, 2015 | shares   125,746  
Summary of option activity, Weighted average exercise price      
Beginning balance (in dollars per share)   $ 12.42  
Granted      
Exercised      
Expired   $ 16.00  
Ending balance (in dollars per share)   8.48 $ 12.42
Exercisable April 30, 2015   8.48  
Vested April 30, 2015   $ 8.48  
Summary of option activity, Additional disclosures      
Weighted average remaining contractual life   3 years 7 months 2 days 4 years 5 months 16 days
Exercisable, weighted average remaining contractual life   3 years 7 months 2 days  
Expected to vest, weighted average remaining contractual life   3 years 7 months 2 days  
Granted, Aggregate intrinsic value      
Exercised, Aggregate intrinsic value | $      
Expired, Aggregate intrinsic value | $      
Balance April 30, 2015, Aggregate intrinsic value | $ [1]   $ 6,250  
Exercisable April 30, 2015, Aggregate intrinsic value | $      
Vested April 30, 2015, Aggregate intrinsic value | $      
Summary of Significant Accounting Policies (Textual) [Abstract]      
Closing price of common stock on NASDAQ Stock Market   $ 2.17 $ 2.69
Number of in-the-money options outstanding | integer   0  
[1] These amounts represent the difference between the exercise price and the closing price of Dataram Common Stock as of the end of the reporting period, $2.17 on April 30, 2015 as reported on the NASDAQ Stock Market. There are no in-the-money options outstanding at April 30, 2015.