Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Additional Information (Detail)

v2.4.1.9
Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)
12 Months Ended
Dec. 31, 2014
Segment
Dec. 31, 2013
Summary Of Significant Accounting Policies [Line Items]    
Restricted cash $ 0us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue $ 72,497us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue
Trade accounts receivable 0us-gaap_AccountsReceivableNetCurrent 481,810us-gaap_AccountsReceivableNetCurrent
Allowance for doubtful accounts 0us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent 0us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Impairments loss 0us-gaap_ImpairmentOfLongLivedAssetsHeldForUse 0us-gaap_ImpairmentOfLongLivedAssetsHeldForUse
Milestones arrangement, categories description The Company aggregates milestones into three categories (i) research milestones, (ii) development milestones and (iii) commercial milestones.  
Number of Operating segment 1us-gaap_NumberOfOperatingSegments  
Stock equivalents granted   0us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment
Fair Value, Inputs, Level 1 [Member]    
Summary Of Significant Accounting Policies [Line Items]    
Cash and Cash Equivalents, Fair Value $ 4,800,573us-gaap_CashAndCashEquivalentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
$ 3,307,520us-gaap_CashAndCashEquivalentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member