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Related parties -Additional Information (Details) - USD ($)
12 Months Ended
Jan. 30, 2017
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2021
Mar. 31, 2020
Related Party Transaction [Line Items]          
Common stock issued for notes purchased   66,155,340   92,619,641 9,162,976
Related party [Member]          
Related Party Transaction [Line Items]          
Aggregate principal amount of notes $ 7,000,000        
Interest rate of notes 5.00%        
Term of notes 5 years        
Interest expense   $ 200,000 $ 300,000    
Common stock issued for notes purchased 25,000        
Promissory Notes Purchased $ 250,000        
Related party [Member] | Two Board Members [Member]          
Related Party Transaction [Line Items]          
Aggregate principal amount of notes $ 6,000,000.0