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Long-term debt (Details) - USD ($)
$ in Thousands
Apr. 30, 2020
Mar. 31, 2021
Dec. 31, 2020
Future debt principal payments      
2021 (represents remaining nine months in 2021)   $ 366  
2022   134  
Total   500  
Less current portion of long-term debt   (366) $ (366)
Long-term debt, net of current portion   $ 134 $ 134
Paycheck Protection Program      
Debt Instrument [Line Items]      
Debt amount $ 500    
Debt term (in Years) 2 years    
Interest rate 1.00%    
Payments deferred period 6 months