Quarterly report pursuant to Section 13 or 15(d)

Sales of Securities (Details Narrative)

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Sales of Securities (Details Narrative) (USD $)
6 Months Ended 0 Months Ended 1 Months Ended
Oct. 31, 2014
Oct. 31, 2013
May 11, 2011
Sep. 18, 2013
Mar. 31, 2014
Mar. 20, 2014
Securities Purchase Agreements (Textual) [Abstract]            
Net proceeds from sale of common stock and warrants    $ 695,491us-gaap_ProceedsFromIssuanceOfCommonStock        
Securities Purchase Agreement of May 11, 2011            
Securities Purchase Agreements (Textual) [Abstract]            
Numer of common stock sold     295,833us-gaap_StockIssuedDuringPeriodSharesIssuedForCash
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= DRAM_SecuritiesPurchaseAgreement1Member
     
Number of common stock called by warrants     221,875us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ DRAM_AgreementAxis
= DRAM_SecuritiesPurchaseAgreement1Member
     
Net proceeds from sale of common stock and warrants     2,998,000us-gaap_ProceedsFromIssuanceOfCommonStock
/ DRAM_AgreementAxis
= DRAM_SecuritiesPurchaseAgreement1Member
     
Combination of securities offered in Securities Purchase Agreement, description     The common stock and warrants were sold in fixed combinations, with each combination consisting of one share of common stock and 0.75 of one warrant, with each whole warrant exercisable for one share of common stock.      
Purchase price per fixed combination     11.28DRAM_PriceOfSecurityPerFixedCombinationOfCommonStockAndWarrant
/ DRAM_AgreementAxis
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Description of period for exercisability of warrants     The warrants became exercisable six months and one day following the closing date of the Offering and will remain exercisable for five years thereafter.      
Percentage of holding in common stock after which exercisability of warrant may be limited     4.99%DRAM_PercentageOfHoldingInCommonStockAfterWhichExercisabilityOfWarrantBeLimited
/ DRAM_AgreementAxis
= DRAM_SecuritiesPurchaseAgreement1Member
     
Right to call warrants for cancellation, description     After the one year anniversary of the initial exercise date of the warrants, the Company has the right to call the warrants for cancellation for $.006 per share in the event that the volume weighted average price of the Company’s Common Stock for 20 consecutive trading days exceeds $27.12.      
Exercise price of warrants     $ 13.56us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
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= DRAM_SecuritiesPurchaseAgreement1Member
     
Securities Purchase Agreement of September 18, 2013            
Securities Purchase Agreements (Textual) [Abstract]            
Numer of common stock sold       350,931us-gaap_StockIssuedDuringPeriodSharesIssuedForCash
/ DRAM_AgreementAxis
= DRAM_SecuritiesPurchaseAgreement2Member
   
Proceeds from sale of common stock and warrants, gross       807,000us-gaap_StockIssuedDuringPeriodValueIssuedForCash
/ DRAM_AgreementAxis
= DRAM_SecuritiesPurchaseAgreement2Member
   
Net proceeds from sale of common stock and warrants       695,491us-gaap_ProceedsFromIssuanceOfCommonStock
/ DRAM_AgreementAxis
= DRAM_SecuritiesPurchaseAgreement2Member
   
Combination of securities offered in Securities Purchase Agreement, description       The common stock and warrants were sold in fixed combinations, with each combination consisting of one share of common stock and one warrant, with each warrant exercisable for one share of common stock.    
Purchase price per fixed combination       2.30DRAM_PriceOfSecurityPerFixedCombinationOfCommonStockAndWarrant
/ DRAM_AgreementAxis
= DRAM_SecuritiesPurchaseAgreement2Member
   
Description of period for exercisability of warrants       The exercisability of the warrants may be limited if, upon exercise, the holder or any of its affiliates would beneficially own more that 4.99% of the Common Stock.    
Percentage of holding in common stock after which exercisability of warrant may be limited       4.99%DRAM_PercentageOfHoldingInCommonStockAfterWhichExercisabilityOfWarrantBeLimited
/ DRAM_AgreementAxis
= DRAM_SecuritiesPurchaseAgreement2Member
   
Right to call warrants for cancellation, description       After the one year anniversary of the initial exercise date of the warrants, the Company had the right to call the warrants for cancellation for $.001 per share in the event that the volume weighted average price of the Company’s Common Stock for 20 consecutive trading days exceeds $10.00.    
Common Stock Purchase Agreement            
Securities Purchase Agreements (Textual) [Abstract]            
Numer of common stock sold         219,754us-gaap_StockIssuedDuringPeriodSharesIssuedForCash
/ DRAM_AgreementAxis
= DRAM_CommonStockPurchaseAgreementMember
 
Proceeds from sale of common stock and warrants, gross         559,000us-gaap_StockIssuedDuringPeriodValueIssuedForCash
/ DRAM_AgreementAxis
= DRAM_CommonStockPurchaseAgreementMember
 
Price per share           $ 3.00us-gaap_SaleOfStockPricePerShare
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= DRAM_CommonStockPurchaseAgreementMember
Warrants exercised         86,100us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised
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= DRAM_CommonStockPurchaseAgreementMember
 
Exercise price of warrants           $ 3.50us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ DRAM_AgreementAxis
= DRAM_CommonStockPurchaseAgreementMember
Proceeds from exercise of warrants         $ 306,350us-gaap_ProceedsFromWarrantExercises
/ DRAM_AgreementAxis
= DRAM_CommonStockPurchaseAgreementMember
 
Common stock issued upon exercise of warrants         86,100us-gaap_StockIssuedDuringPeriodSharesOther
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= DRAM_CommonStockPurchaseAgreementMember