Post-effective amendment to a registration statement that is not immediately effective upon filing

Stockholders' Equity - Additional Information (Detail)

v3.3.1.900
Stockholders' Equity - Additional Information (Detail) - USD ($)
 3 Months Ended 12 Months Ended
Jul. 24, 2015
Jul. 06, 2015
Dec. 17, 2014
Dec. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Dec. 16, 2014
Dec. 05, 2014
Schedule Of Stockholders Equity [Line Items]                
Common stock, shares authorized       300,000,000 300,000,000 300,000,000    
Common stock, par value       $ 0.001 $ 0.001 $ 0.001    
Common stock, shares issued       29,279,522 39,833,023 29,279,522    
Common stock, outstanding       29,279,522 39,833,023 29,279,522   13,863,647
Preferred stock, shares authorized         10,000,000   10,000,000  
Preferred stock, par value         $ 0.001   $ 0.001  
Preferred stock issued       0 0 0    
Preferred stock, shares outstanding       0 0 0    
Aggregate cash proceeds from issuance of shares           $ 7,342,076    
Shares issued under options plan         305,329      
Warrants issued to placement agents     542,360          
Exercise price of warrants issued to placement agents     $ 2.00   $ 2.00      
Number of shares, Options exercised         5,000 0    
Gross proceeds from issuance initial public offering   $ 28,300,000            
Net proceeds from issuance initial public offering   $ 25,800,000            
Placement agents [Member]                
Schedule Of Stockholders Equity [Line Items]                
Sales of common stock, price per share $ 2.75              
Number of shares, Options exercised 1,211,827              
Common Stock [Member]                
Schedule Of Stockholders Equity [Line Items]                
Stock issued         10,302,736 6,779,510    
Number of shares, Options exercised         5,000      
Common Stock [Member] | Private Placement [Member]                
Schedule Of Stockholders Equity [Line Items]                
Stock issued     6,779,510          
Sales of common stock, price per share     $ 2.00          
Proceeds from sale of stock, gross     $ 13,600,000          
Proceeds from sale of stock, net     $ 12,000,000          
Common Stock [Member] | IPO [Member]                
Schedule Of Stockholders Equity [Line Items]                
Stock issued   9,090,909            
Sales of common stock, price per share   $ 2.75            
2014 Incentive Plan [Member]                
Schedule Of Stockholders Equity [Line Items]                
Common stock reserved for issuance     3,200,000          
Shares issued under options plan     2,519,500          
Common stock available for grant     680,500          
Marika Inc. [Member]                
Schedule Of Stockholders Equity [Line Items]                
Common stock, outstanding     2,500,012          
Pieris AG [Member]                
Schedule Of Stockholders Equity [Line Items]                
Common stock, outstanding     20,000,000          
Series C Preferred Stock [Member]                
Schedule Of Stockholders Equity [Line Items]                
Preferred stock issued     10,671,037 5,662,167   5,662,167    
Aggregate cash proceeds from issuance of shares       $ 7,400,000        
Convertible stockholder loans, including accrued interest       $ 4,400,000        
Converted series c preferred shares       5,008,870