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CONDENSED STATEMENTS OF CHANGES IN MEMBERS' & SHAREHOLDERS' EQUITY (USD $)
Class A Membership Interests
Common Stock
Additional paid-capital
Deficit during Development Stage
Total
Balance (in units) at Dec. 31, 2012 614,633us-gaap_CommonUnitOutstanding
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_MemberUnitsMember
       
Balance at Dec. 31, 2012 $ 1,305,107dprx_MembersAndStockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_MemberUnitsMember
      $ 1,305,107dprx_MembersAndStockholdersEquity
Increase (Decrease) in Stockholders' Equity          
Private Placement Offerings at $50 per unit, Net Of Issuance Costs 4,598,300dprx_StockIssuedDuringPeriodValuePrivatePlacement
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_MemberUnitsMember
      4,598,300dprx_StockIssuedDuringPeriodValuePrivatePlacement
Private Placement Offerings , net of issuance costs (in units) 92,350dprx_StockIssuedDuringPeriodSharesPrivatePlacement
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_MemberUnitsMember
       
Executive Compensation Settled with Membership Interests 115,500us-gaap_StockIssuedDuringPeriodValueIssuedForServices
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_MemberUnitsMember
      115,500us-gaap_StockIssuedDuringPeriodValueIssuedForServices
Executive compensation settled with Membership Interests (in units) 2,310us-gaap_StockIssuedDuringPeriodSharesIssuedForServices
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_MemberUnitsMember
      2,310us-gaap_StockIssuedDuringPeriodSharesIssuedForServices
Share-Based Compensation 1,077,777us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_MemberUnitsMember
      1,077,777us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation
Issuance of Restricted Membership Interest Awards (in shares) 22,665us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_MemberUnitsMember
       
Share Based Payments to Vendors 123,167us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionStockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_MemberUnitsMember
      123,167us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionStockholdersEquity
Issuance of Restricted Membership Interest Awards to Vendors (in units) 3,630dprx_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeituresToVendors
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_MemberUnitsMember
       
Net Loss (4,013,620)us-gaap_NetIncomeLoss
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_MemberUnitsMember
      (4,013,620)us-gaap_NetIncomeLoss
Balance (in units) at Dec. 31, 2013 735,588us-gaap_CommonUnitOutstanding
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_MemberUnitsMember
       
Balance at Dec. 31, 2013 3,206,231dprx_MembersAndStockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_MemberUnitsMember
      3,206,231dprx_MembersAndStockholdersEquity
Increase (Decrease) in Stockholders' Equity          
Executive compensation settled with Membership Interests (in units)         0us-gaap_StockIssuedDuringPeriodSharesIssuedForServices
Share-Based Compensation     1,418,312us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
  1,418,312us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation
Issuance of Restricted Membership Interest Awards (in shares) 1,000us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_MemberUnitsMember
       
Issuance of Restricted Membership Interest to Vendors 380,200dprx_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeituresToVendors
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_MemberUnitsMember
  69,812dprx_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeituresToVendors
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
  450,012dprx_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeituresToVendors
Issuance of Restricted Membership Interest Awards to Vendors (in units) 7,604dprx_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeituresToVendors
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_MemberUnitsMember
       
Issuance of Membership Interest for Warrant Conversion (in shares) 23,719us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_MemberUnitsMember
       
Corporate Conversion (3,586,431)dprx_StockIssuedDuringPeriodValueCorporateConversion
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_MemberUnitsMember
5,375dprx_StockIssuedDuringPeriodValueCorporateConversion
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
12,318,821dprx_StockIssuedDuringPeriodValueCorporateConversion
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
(8,737,765)dprx_StockIssuedDuringPeriodValueCorporateConversion
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDeficitDuringDevelopmentStageMember
 
Corporate Conversion (in shares) (767,911)dprx_StockIssuedDuringPeriodSharesCorporateConversion
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_MemberUnitsMember
5,375,377dprx_StockIssuedDuringPeriodSharesCorporateConversion
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
     
Initial Public Offering, Net of Issuance Costs   3,163us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
34,452,506us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
  34,455,669us-gaap_StockIssuedDuringPeriodValueNewIssues
Initial Public Offering, net of issuance costs (in shares)   3,162,500us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
     
Net Loss       (13,580,984)us-gaap_NetIncomeLoss
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDeficitDuringDevelopmentStageMember
(13,580,984)us-gaap_NetIncomeLoss
Cashless Exercise of Warrants   452us-gaap_ClassOfWarrantOrRightOutstanding
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
     
Balance (in shares) at Dec. 31, 2014   8,538,329us-gaap_CommonStockSharesOutstanding
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
    8,538,329us-gaap_CommonStockSharesOutstanding
Balance at Dec. 31, 2014   $ 8,538dprx_MembersAndStockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
$ 48,259,451dprx_MembersAndStockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
$ (22,318,749)dprx_MembersAndStockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDeficitDuringDevelopmentStageMember
$ 25,949,240dprx_MembersAndStockholdersEquity