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Related Parties Transactions (Details) - USD ($)
$ / shares in Units, $ in Millions
1 Months Ended
May 31, 2018
Dec. 31, 2019
Related Party Transaction [Line Items]    
Income tax liabilities related to stock-based compensation   $ 1.2
Current asset, reimbursement from officer   $ 1.2
Directors [Member]    
Related Party Transaction [Line Items]    
Common stock repurchased and subsequently cancelled, shares 1,225,214  
Average price per share $ 22.81  
Common stock repurchased and subsequently cancelled, discount rate 2.00%