XML 65 R46.htm IDEA: XBRL DOCUMENT v3.21.1
Long-term debt - Hercules Loan Agreement (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 15, 2020
Jun. 01, 2020
Aug. 08, 2019
Mar. 31, 2021
Mar. 31, 2020
Debt Securities          
Loss on extinguishment of debt       $ (913)  
Interest expense       818 $ 734
Noncash interest expense       181 156
Debt discount         199
Hercules Loan Agreement          
Debt Securities          
Maximum borrowing capacity     $ 30,000    
Borrowed amount     10,000    
Payment of issuance costs     225    
Additional closing and legal fees     $ 130    
Total paid amount $ 10,839        
Outstanding principal 10,000       0
Term charge 495        
Termination fee due 300        
Accrued interest 44        
Unused borrowing capacity available under the facility   $ 30,000      
Upfront fees, including closing costs and legal fees       355  
Interest expense       818 734
Noncash interest expense       181 156
Accretion of the debt discount       82 60
Accretion of the final payment       99 96
Principal payments due or paid 10,000       $ 0
Hercules first amendment          
Debt Securities          
Additional closing and legal fees   100      
Upfront fees, including closing costs and legal fees       $ 100  
Hercules loan agreement, second advance          
Debt Securities          
Maximum borrowing capacity   40,000      
Hercules loan agreement, third advance          
Debt Securities          
Maximum borrowing capacity   $ 10,000      
Prime Rate | Hercules Loan Agreement          
Debt Securities          
Loss on extinguishment of debt $ 913