XML 166 R149.htm IDEA: XBRL DOCUMENT v3.21.1
ADDITIONAL INFORMATION-CONDENSED FINANCIAL STATEMENTS OF THE PARENT COMPANY (Condensed Balance Sheets - Parenthetical) (Details) - $ / shares
Dec. 31, 2020
Dec. 31, 2019
May 31, 2019
Feb. 28, 2018
Condensed Financial Statements, Captions [Line Items]        
Ordinary shares, par value $ 0.00002 $ 0.00002 $ 0.00002 $ 0.00002
Ordinary shares, shares authorized 500,000,000 500,000,000    
Ordinary shares, shares issued 190,380,309 180,653,497    
Ordinary shares, shares outstanding 187,434,469 178,930,297    
Treasury stock at cost, shares 2,945,840 1,723,200    
Parent Company [Member] | Reportable Legal Entities [Member]        
Condensed Financial Statements, Captions [Line Items]        
Ordinary shares, par value $ 0.00002 $ 0.00002    
Ordinary shares, shares authorized 500,000,000 500,000,000    
Ordinary shares, shares issued 190,380,309 180,653,497    
Ordinary shares, shares outstanding 187,434,469 178,930,297    
Treasury stock at cost, shares 2,945,840 1,723,200