Pieris Pharmaceuticals, Inc. General form of registration statement for all companies including face-amount certificate companies

General form of registration statement for all companies including face-amount certificate companies

Revenues - Additional Information (Detail)

Revenues - Additional Information (Detail) (USD $)	3 Months Ended		12 Months Ended		1 Months Ended			12 Months Ended		1 Months Ended
Revenues - Additional Information (Detail) (USD $)	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Aug. 31, 2011 Tranches	Aug. 31, 2009	May 31, 2011	Dec. 31, 2011	Dec. 31, 2012	Sep. 30, 2010	Feb. 28, 2013
Deferred Revenue Arrangement [Line Items]
Revenue	$ 217,621us-gaap_Revenues	$ 1,372,879us-gaap_Revenues	$ 5,365,054us-gaap_Revenues	$ 12,427,292us-gaap_Revenues
Collaboration agreement, license revenue			473,039us-gaap_LicenseAndServicesRevenue	5,159,425us-gaap_LicenseAndServicesRevenue
Collaboration agreement, milestone payments			3,184,988	1,128,630
Research and development services revenue			876,619	3,591,855
Revenues from product sales	0us-gaap_SalesRevenueGoodsNet
BIO Cluster M4 [Member]
Deferred Revenue Arrangement [Line Items]
Grant received			116,020	117,023
Funding rate			40.00%
Seventh Research Framework Program (FP7 Agreement) [Member]
Deferred Revenue Arrangement [Line Items]
Grant received				2,915,559
Seventh Research Framework Program (FP7 Agreement) [Member] \| European Union [Member]
Deferred Revenue Arrangement [Line Items]
Collaboration agreement, milestone payments					7,260,600
Funding rate					64.00%
Tranches of payments					3
Maximum [Member] \| BIO Cluster M4 [Member]
Deferred Revenue Arrangement [Line Items]
Collaboration agreement, milestone payments			1,375,017
Collaborative Arrangement [Member]
Deferred Revenue Arrangement [Line Items]
Collaboration agreement, milestone payments	0	300,000
Other Arrangement [Member]
Deferred Revenue Arrangement [Line Items]
Research and development services revenue			0	138,091
Collaboration Partner One [Member] \| Sales Revenue, Net [Member] \| Revenue From Partners [Member]
Deferred Revenue Arrangement [Line Items]
Revenue			2,981,992	5,573,441
Collaboration Partner Two [Member] \| Sales Revenue, Net [Member] \| Revenue From Partners [Member]
Deferred Revenue Arrangement [Line Items]
Revenue			1,354,861	4,168,278
Government Grant [Member] \| Sales Revenue, Net [Member] \| Revenue From Partners [Member]
Deferred Revenue Arrangement [Line Items]
Revenue			714,388	2,430,358
Allergan Inc [Member] \| Collaborative Arrangement [Member]
Deferred Revenue Arrangement [Line Items]
Collaboration agreement, milestone payments	0
Allergan Inc [Member] \| Collaborative Arrangement [Member] \| Maximum [Member]
Deferred Revenue Arrangement [Line Items]
Collaboration agreement, milestone payments	13,000,000		13,000,000
Allergan Inc [Member] \| Collaborative Arrangement [Member] \| Upfront Payment Arrangement [Member]
Deferred Revenue Arrangement [Line Items]
Collaboration agreement, license revenue						10,000,000
Daiichi Sankyo Inc [Member] \| Collaborative Arrangement [Member]
Deferred Revenue Arrangement [Line Items]
Research collaboration agreement, estimated period	2 years		2 years
Collaboration agreement, revenue recognized	0	700,000	3,000,000	5,600,000
Collaboration agreement, milestone payments			2,300,000	1,100,000
Daiichi Sankyo Inc [Member] \| Collaborative Arrangement [Member] \| Maximum [Member]
Deferred Revenue Arrangement [Line Items]
Collaboration agreement, milestone payments	87,600,000		98,700,000
Daiichi Sankyo Inc [Member] \| Collaborative Arrangement [Member] \| Maximum [Member] \| Research Milestones [Member]
Deferred Revenue Arrangement [Line Items]
Collaboration agreement, milestone payments	2,500,000		2,800,000
Daiichi Sankyo Inc [Member] \| Collaborative Arrangement [Member] \| Maximum [Member] \| Development Milestones [Member]
Deferred Revenue Arrangement [Line Items]
Collaboration agreement, milestone payments	36,000,000		40,500,000
Daiichi Sankyo Inc [Member] \| Collaborative Arrangement [Member] \| Maximum [Member] \| Commercial Milestones [Member]
Deferred Revenue Arrangement [Line Items]
Collaboration agreement, milestone payments	48,300,000		54,500,000
Daiichi Sankyo Inc [Member] \| Collaborative Arrangement [Member] \| Maximum [Member] \| Additional Diagnostic Milestones [Member]
Deferred Revenue Arrangement [Line Items]
Collaboration agreement, milestone payments	700,000		900,000
Daiichi Sankyo Inc [Member] \| Collaborative Arrangement [Member] \| Upfront Payment Arrangement [Member]
Deferred Revenue Arrangement [Line Items]
Collaboration agreement, license revenue							10,100,000
Sanofi [Member] \| Collaborative Arrangement [Member]
Deferred Revenue Arrangement [Line Items]
Collaboration agreement, revenue recognized	0	500,000	1,400,000	4,200,000
Collaboration agreement, milestone payments		300,000	900,000	0
Description of factors in determining milestones substantive	Factors considered in determining the options were substantive were whether (i) Sanofi could obtain the overall objective of the agreement without exercising any options, (ii) Sanofi was able to obtain value from the initial licenses obtained without exercising any options, (iii) the cost to exercise the options was significant relative to the total upfront payment of $4.9 million for two licenses and four options, and (iv) exercising the option created additional financial commitments for Sanofi or imposed economic penalties on Sanofi.		Factors considered in determining the options were substantive were whether (i) Sanofi could obtain the overall objective of the agreement without exercising any options, (ii) Sanofi was able to obtain value from the initial licenses obtained without exercising any options, (iii) the cost to exercise the options was significant relative to the total upfront payment of $4.9 million for two licenses and four options, and (iv) exercising the option created additional financial commitments for Sanofi or imposed economic penalties on Sanofi.
Collaborative arrangement, consideration										8,100,000
Sanofi [Member] \| Collaborative Arrangement [Member] \| Expired Option Agreement [Member]
Deferred Revenue Arrangement [Line Items]
Collaboration agreement, revenue recognized								700,000
Sanofi [Member] \| Collaborative Arrangement [Member] \| Options Exercised [Member]
Deferred Revenue Arrangement [Line Items]
Collaboration agreement, revenue recognized									350,000
Collaborative arrangement, consideration	270,000										350,000
Sanofi [Member] \| Collaborative Arrangement [Member] \| Options, Exercised Price [Member]
Deferred Revenue Arrangement [Line Items]
Collaborative arrangement, consideration	1,100,000										1,400,000
Sanofi [Member] \| Collaborative Arrangement [Member] \| Licenses [Member]
Deferred Revenue Arrangement [Line Items]
Collaborative arrangement, consideration										3,500,000
Sanofi [Member] \| Collaborative Arrangement [Member] \| Options to Acquire Additional Licenses [Member]
Deferred Revenue Arrangement [Line Items]
Collaborative arrangement, consideration										1,400,000
Sanofi [Member] \| Collaborative Arrangement [Member] \| Research Services [Member]
Deferred Revenue Arrangement [Line Items]
Research collaboration agreement, estimated period									2 years
Collaborative arrangement, consideration										3,200,000
Sanofi [Member] \| Collaborative Arrangement [Member] \| Research Services [Member] \| Extension Term [Member]
Deferred Revenue Arrangement [Line Items]
Research collaboration agreement, estimated period									40 months
Sanofi [Member] \| Collaborative Arrangement [Member] \| Maximum [Member]
Deferred Revenue Arrangement [Line Items]
Collaboration agreement, milestone payments	49,600,000		55,900,000
Sanofi [Member] \| Collaborative Arrangement [Member] \| Maximum [Member] \| Research Milestones [Member]
Deferred Revenue Arrangement [Line Items]
Collaboration agreement, milestone payments	1,800,000		2,100,000
Sanofi [Member] \| Collaborative Arrangement [Member] \| Maximum [Member] \| Development Milestones [Member]
Deferred Revenue Arrangement [Line Items]
Collaboration agreement, milestone payments	28,500,000		32,100,000
Sanofi [Member] \| Collaborative Arrangement [Member] \| Maximum [Member] \| Commercial Milestones [Member]
Deferred Revenue Arrangement [Line Items]
Collaboration agreement, milestone payments	19,300,000		21,800,000
Sanofi [Member] \| Collaborative Arrangement [Member] \| Upfront Payment Arrangement [Member]
Deferred Revenue Arrangement [Line Items]
Collaboration agreement, license revenue										$ 4,900,000