Quarterly report pursuant to Section 13 or 15(d)

SUBSEQUENT EVENTS (Details)

v3.21.1
SUBSEQUENT EVENTS (Details) - USD ($)
$ in Millions
1 Months Ended
Apr. 14, 2021
Apr. 30, 2021
Loan and security agreement    
Subsequent Event [Line Items]    
Variable margin rate 0.12%  
Subsequent events    
Subsequent Event [Line Items]    
Gross proceeds from issuance of debt   $ 15.0
Subsequent events | Loan and security agreement    
Subsequent Event [Line Items]    
Maximum borrowing capacity $ 30.0 30.0
Gross proceeds from issuance of debt   15.0
Remaining borrowing capacity   $ 15.0
Funding based on ability to obtain equity or subordinated debt financing and the achievement of certain clinical milestones $ 70.0  
Stated interest rate 8.75% 8.75%
Variable margin rate 0.12% 0.12%
Contractual rate 8.87%  
Non-refundable facility fee 1.00%  
Final fee 4.75%  
Debt discounts $ 1.4  
Financial advisory and legal fees $ 0.5  
Exit fee on the funded principal balance 4.00%  
Percentage of entity's shares held by investors 35.00%  
Exit event term 10 years  
Default interest rate 5.00%  
Subsequent events | Loan and security agreement | Term A loan    
Subsequent Event [Line Items]    
Gross proceeds from issuance of debt $ 15.0  
Debt discounts 1.4  
Facility Fee and Final Fee 0.9  
Subsequent events | Loan and security agreement | Term B loan    
Subsequent Event [Line Items]    
Remaining borrowing capacity 7.5  
Funding based on ability to obtain equity or subordinated debt financing and the achievement of certain clinical milestones 35.0  
Cash balance requirement 5.0  
Subsequent events | Loan and security agreement | Term C loan    
Subsequent Event [Line Items]    
Remaining borrowing capacity 7.5  
Funding based on ability to obtain equity or subordinated debt financing and the achievement of certain clinical milestones $ 35.0  
Subsequent events | Loan and security agreement | Minimum    
Subsequent Event [Line Items]    
Prepayment fee 1.00%  
Subsequent events | Loan and security agreement | Maximum    
Subsequent Event [Line Items]    
Prepayment fee 3.00%