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ISSUANCE OF MEMBERSHIP INTERESTS and COMMON STOCK (Details) (USD $)	0 Months Ended	12 Months Ended	1 Months Ended		0 Months Ended
	Mar. 18, 2014	Dec. 31, 2014	Feb. 28, 2014	Oct. 31, 2014	Nov. 15, 2013 item	Jul. 12, 2013 item	Feb. 13, 2013 item
Issuance of membership interests and common stock
Conversion ratio	7
Shares of common stock issued in IPO	3,162,500
Share price of common stock (in dollars per share)	$ 12us-gaap_SharePrice
Net proceeds from IPO	$ 34,455,669	$ 34,455,669
Underwriting discounts	2,656,500dprx_UnderwritingDiscountsExpense
Offering costs	837,831dprx_OfferingCosts
Shares of common stock issued upon conversion of membership interests	5,375,377us-gaap_ConversionOfStockSharesIssued1
Common Stock, Shares, Issued		8,538,329us-gaap_CommonStockSharesIssued
Class A Membership Interests
Issuance of membership interests and common stock
Number of Class A Membership Interests that can be purchased with warrant			89,900
Exercise price (in dollars per unit)			$ 60
Membership interests issued to investors in prior financings in exchange for outstanding warrants		23,719	23,719
Implied intrinsic value of the warrants (in dollars per share)			$ 8.57
Conversion ratio	7		7
Share price of common stock (in dollars per share)			$ 11.50
Membership interests converted into shares of common stock	767,911
Warrants
Issuance of membership interests and common stock
Implied intrinsic value of the warrants (in dollars per share)			$ 2.93
Stock and Warrants Issued During Period, Value, Preferred Stock and Warrants				2,800
Common Stock, Shares, Issued				452
Securities purchase agreement
Issuance of membership interests and common stock
Number of investors with whom entity has entered into agreement for the private placement					25	28	7
Number of membership interests that can be purchased with each unit						1	1
Number of Class A Membership Interests that can be purchased with warrant						0.5
Units issued and sold					18,850	55,500	18,000
Aggregate membership interests issued and sold					18,850	55,500	18,000
Number of Class A Membership Interests that can be purchased with aggregate warrants issued and sold					9,425	27,750	9,000
Share price of common stock (in dollars per share)							$ 50
Securities purchase agreement \| Unit
Issuance of membership interests and common stock
Number of membership interests that can be purchased with each unit					1
Number of Class A Membership Interests that can be purchased with warrant					0.5		0.5
Share price of common stock (in dollars per share)					50	50
Proceeds from issuance of units					942,500	2,775,000	$ 900,000
Securities purchase agreement \| Warrants
Issuance of membership interests and common stock
Exercise price (in dollars per unit)					60	60	$ 60
Securities purchase agreement \| Warrants \| Maximum
Issuance of membership interests and common stock
Exercise period of warrant					5 years	5 years	5 years