v3.21.2
Organization and description of business (Acquisition of Vision Lane) (Details) - Vision Lane Limited - USD ($)
Mar. 08, 2019
Feb. 05, 2019
Dec. 31, 2018
Payments to Acquire Businesses, Gross   $ 7,460,000 $ 6,410,000
Stock Issued During Period, Shares, Acquisitions 4,519,347 4,519,347  
Business Combination, Consideration Transferred $ 12,740,000 $ 12,420,000  
Paris Sky Limited      
Payments to Acquire Businesses, Gross   $ 7,500,000  
Fair value of equity issued in business acquisition $ 5,240,000    
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares 4,519,347 4,519,347  
Business Combination, Consideration Transferred $ 12,700,000 $ 12,428,205  
Sale of Stock, Price Per Share $ 1.16 $ 1.10