Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Selling, general and administrative expenses (Tables)

v3.8.0.1
Selling, general and administrative expenses (Tables)
12 Months Ended
Dec. 31, 2017
Selling, General and Administrative Expense [Abstract]  
Schedule of selling, general and administrative expenses
Selling, general and administrative expenses consisted of the following for the years ended December 31, 2017, 2016 and 2015:
 
Year Ended December 31,
 
2017
 
2016
 
2015
Personnel expenses
$
156,726

 
$
149,505

 
$
161,967

Share-based compensation
107,719

 
102,843

 
100,162

Travel expenses
19,774

 
21,201

 
23,090

Professional services
28,585

 
30,983

 
42,921

Office expenses
16,105

 
20,703

 
26,989

Directors’ expenses
3,345

 
3,051

 
2,780

Other expenses
16,037

 
22,726

 
23,399

 
$
348,291

 
$
351,012

 
$
381,308