Quarterly report pursuant to Section 13 or 15(d)

DEBT (Details)

v3.22.1
DEBT (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
May 31, 2020
Debt Instrument [Line Items]        
Unamortized issuance costs and debt discounts     $ 100  
Interest expense $ 1,205 $ 485    
Credit Facility with MidCap        
Debt Instrument [Line Items]        
Maximum borrowing capacity 60,000      
Remaining borrowing capacity $ 30,000      
Final payment fee, percentage of principal 2.50%      
Outstanding balance $ 30,000      
Outstanding balance, net 29,800   $ 19,900  
Unamortized issuance costs and debt discounts 200      
Interest expense 500 $ 400    
Accrued interest $ 600      
Credit Facility with MidCap | LIBOR        
Debt Instrument [Line Items]        
Basis spread on variable rate 5.65%      
Floor rate 1.50%      
Credit Facility with MidCap | Tranche 1        
Debt Instrument [Line Items]        
Outstanding balance $ 10,000      
Credit Facility with MidCap | Tranche 2        
Debt Instrument [Line Items]        
Outstanding balance       $ 10,000
Credit Facility with MidCap | Tranche 3        
Debt Instrument [Line Items]        
Maximum borrowing capacity 10,000      
Outstanding balance 10,000      
Credit Facility with MidCap | Tranche 4        
Debt Instrument [Line Items]        
Maximum borrowing capacity 10,000      
Credit Facility with MidCap | Tranche 5        
Debt Instrument [Line Items]        
Maximum borrowing capacity $ 20,000      
Credit Facility with MidCap | Initial interest-only payment period        
Debt Instrument [Line Items]        
Interest-only payments period 24 months      
Credit Facility with MidCap | First conditional interest-only payment period        
Debt Instrument [Line Items]        
Interest-only payments period 36 months      
Credit Facility with MidCap | Second conditional interest-only payment period        
Debt Instrument [Line Items]        
Interest-only payments period 48 months      
Credit Facility with MidCap | Extended conditional interest-only payment period        
Debt Instrument [Line Items]        
Interest-only payments period 36 months