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Debt (Tables)
9 Months Ended
Sep. 30, 2021
Debt  
Schedule of interest expense on the convertible notes, including amortization of debt issuance costs

Three Months Ended September 30, 

Nine Months Ended September 30, 

    

2021

    

2020

   

2021

    

2020

Coupon interest

$

$

262

$

512

$

660

Issuance costs amortization

 

 

18

 

31

 

34

Discount amortization

 

 

228

 

352

 

536

$

$

508

$

895

$

1,230