Annual report pursuant to Section 13 and 15(d)

Significant Accounting Policies (Details Textual)

v3.19.1
Significant Accounting Policies (Details Textual)
$ in Thousands
12 Months Ended
Dec. 31, 2018
USD ($)
Significant Accounting Policies (Textual)  
Description of deferred revenue recognized We have deferred revenue of $57.4 million related to contractual commitments with customers where the performance obligation will be satisfied over time, which ranges from one to two years as of December 31, 2018.
Deferred course expenses training events term 45 days
Income tax expense $ 160
Maximum [Member]  
Significant Accounting Policies (Textual)  
US federal corporate tax rate 35.00%
Minimum [Member]  
Significant Accounting Policies (Textual)  
US federal corporate tax rate 21.00%