v3.25.1
Organization and description of business - Acquisition of Paris Sky Limited (Details)
$ / shares in Units, $ in Thousands, $ in Thousands
3 Months Ended
Sep. 20, 2020
HKD ($)
Sep. 20, 2019
USD ($)
shares
Apr. 25, 2019
USD ($)
shares
Apr. 25, 2019
HKD ($)
shares
Jun. 07, 2018
USD ($)
$ / shares
shares
Apr. 28, 2017
shares
Apr. 23, 2017
shares
Dec. 31, 2018
Jan. 31, 2020
Jun. 07, 2018
HKD ($)
Organization And Description of Business [Line Items]                    
Interest rate                 8.00%  
Century Skyway Limited                    
Organization And Description of Business [Line Items]                    
Consideration         $ 16,170          
Percentage of ownership to sell in disposal               51.00%    
Century Skyway Limited | Ho Pui Lung                    
Organization And Description of Business [Line Items]                    
Ownership interest transferred   51.00%                
Consideration to be received $ 99,450 $ 12,750 $ 12,750 $ 99,450            
Number of shares transferred | shares   5,100                
Century Skyway Limited                    
Organization And Description of Business [Line Items]                    
Consideration                   $ 126,130
Paris Sky Limited                    
Organization And Description of Business [Line Items]                    
Principal amount                   27,100
Paris Sky Limited                    
Organization And Description of Business [Line Items]                    
Business acquisition, equity interest issued or issuable (in shares) | shares         3,889,050          
Business acquisition equity interest, value         $ 3,890         30,330
Fair value of equity issued in business acquisition         $ 4,780          
Sale of stock, price per share | $ / shares         $ 1.23          
Principal amount         $ 3,470         $ 27,100
Interest rate         8.00%         8.00%
Percentage of voting interests acquired         100.00%         100.00%
Property, plant and equipment         $ 52,994          
Paris Sky Limited | Century Skyway Limited                    
Organization And Description of Business [Line Items]                    
Percentage of ownership used to pay to acquiree in business combination         49.00%          
Paris Sky Limited | Giant Connection Limited                    
Organization And Description of Business [Line Items]                    
Interest rate         8.00%         8.00%
Paris Sky Limited | Boca International Limited                    
Organization And Description of Business [Line Items]                    
Percentage of ownership used to pay to acquiree in business combination         49.00%          
Fair value of portion of ownership being used to pay acquiree in business combination         $ (23,700)          
Century Skyway Limited                    
Organization And Description of Business [Line Items]                    
Business acquisition, equity interest issued or issuable (in shares) | shares           1,500,000 1,500,000      
Century Skyway Limited | Ho Pui Lung                    
Organization And Description of Business [Line Items]                    
Number of shares to sell | shares     5,100 5,100