Current report of foreign issuer pursuant to Rules 13a-16 and 15d-16 Amendments

Equity Offering and Stock-Based Compensation Plan (Tables)

v2.4.0.8
Equity Offering and Stock-Based Compensation Plan (Tables)
9 Months Ended
Sep. 30, 2013
Equity Offering and Stock-Based Compensation Plan [Abstract]  
Schedule of Share-based Compensation Expense

Stock-based compensation expense for stock options and restricted stock units ("RSUs") was allocated as follows (in thousands):

  Three Months Ended   Nine Months Ended
  September 30,   September 30,
  2013       2012       2013       2012
Cost of sales $       793   $       -   $       2,059   $       -
Research and development, net   821     -     2,567     -
Selling, general and administrative   4,998     784     12,837     1,897
Total stock-based compensation expenses $ 6,612   $ 784   $ 17,463   $ 1,897

Summary of Stock Option Activity

A summary of stock option activity for the nine months ended September 30, 2013 is as follows:

                          Weighted
    Number                   Average
    of Options   Per Share   Exercise
    Outstanding   Exercise Price   Price
Shares under option                                        
       at January 1, 2013   3,315,917     $       2.21    -    $       46.87   $       11.83
Granted   358,239       74.95   -     91.56     84.88
Exchanged for MakerBot options                            
       from merger   77,631       2.74   -     7.30     4.76
Exercised          (1,265,673 )     2.21   -     46.87     7.91
Forfeited   (26,651 )     6.52   -     46.87     34.80
Shares under option                            
       at September 30, 2013   2,459,463     $ 2.21   -   $ 91.56   $ 24.03
Shares exercisable under option                            
       at September 30, 2013   1,412,361     $ 2.21   -   $ 46.87   $ 8.94

Schedule of Stock Option Assumptions

The following table provides the assumptions used in the Black-Scholes pricing model valuation of options granted during the nine months ended September 30, 2013:

Risk-free interest rate 0.61 - 1.54%
Expected option term 5.11 years
Expected price volatility 55.86 - 56.87%
Dividend yield -