Annual report pursuant to Section 13 and 15(d)

Significant Accounting Policies (Details Textual)

v3.20.1
Significant Accounting Policies (Details Textual) - USD ($)
1 Months Ended 12 Months Ended
Jan. 17, 2020
Dec. 31, 2019
Dec. 31, 2018
Significant Accounting Policies (Textual)      
Description of deferred revenue recognized   We had deferred revenue of $46.5 million and $44.2 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, 2019 and 2018, respectively.  
Deferred course expenses training events term   45 days  
Recognized gain   $ 41,000
Subsequent Event [Member]      
Significant Accounting Policies (Textual)      
Amount of sold property $ 390,600    
Recognized gain $ 33,100