Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Tables)

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Stock-Based Compensation (Tables)
 9 Months Ended
Sep. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Total Stock-Based Compensation Expense Related to Share-Based Awards under the Pieris Plan

Total stock-based compensation expense was recorded to operating expenses based upon the functional responsibilities of the individuals holding the respective options as follows:

 

     Three months ended      Nine months ended  
     September 30, 2015      September 30, 2015  

Research and development

    $ 88,176       $ 217,766   

General and administrative

      249,613         605,398   
  

 

 

     

 

 

  

Total stock-based compensation

    $ 337,790       $ 823,164   
  

 

 

     

 

 

  
Schedule of Weighted-Average Assumptions Used for Calculating Value of Options Granted

The Company uses the Black-Scholes option pricing model to determine the estimated grant date fair values for stock-based awards. The weighted-average grant date fair values of the options both in and out of plan granted during the nine months ended September 30, 2015 was $1.94 using the following assumptions:

 

     Three months ended September 30,      Nine months ended September 30,  
     2015      2014      2015      2014  

Dividend yield

      —           —           —           —     

Expected volatility

      72.65% - 73.43%         —           72.65% - 75.07%         —     

Risk-free interest rate

      1.69% - 1.89%         —           1.49% - 1.89%         —     

Expected term

      5.0 - 6.1 years         —           5.0 - 6.1 years         —     

Forfeiture rate

      8.8%         —           8.8%