Quarterly report pursuant to Section 13 or 15(d)

LOAN AND SECURITY AGREEMENT - Additional Information (Details)

v3.21.2
LOAN AND SECURITY AGREEMENT - Additional Information (Details) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Apr. 13, 2031
Oct. 15, 2021
Apr. 14, 2021
Oct. 31, 2021
Sep. 30, 2021
Sep. 30, 2021
Jun. 30, 2021
Debt Instrument [Line Items]              
Net carrying value         $ 14,071,000 $ 14,071,000 $ 13,968,000
Term C loan              
Debt Instrument [Line Items]              
Additional amount required to raise         $ 12,300,000    
Loan and security agreement              
Debt Instrument [Line Items]              
Maximum borrowing capacity     $ 30,000,000.0        
Funding based on ability to obtain equity or subordinated debt financing and the achievement of certain clinical milestones     $ 70,000,000.0        
Stated interest rate     8.75%        
Variable margin rate     0.12%     0.12%  
Contractual rate         8.87% 8.87% 8.87%
Non-refundable facility fee     1.00%        
Final fee     4.75%        
Debt discounts         $ 1,700,000 $ 1,700,000  
Financial advisory and legal fees         500,000 500,000  
Facility Fee and Final Fee         $ 800,000 $ 800,000  
Exit fee on the funded principal balance     4.00%        
Percentage of entity's shares held by investors     35.00%        
Default interest rate     5.00%        
Loan and security agreement | Term A loan              
Debt Instrument [Line Items]              
Gross proceeds from issuance of debt     $ 15,000,000.0        
Stated interest rate         12.60% 12.60% 12.60%
Total debt discount         $ 1,700,000   $ 1,700,000
Embedded derivative associated with the exit fee and prepayment fee related to the term A loan         400,000    
Debt discounts         1,642,000 $ 1,642,000  
Fair value of embedded derivatives     354,000        
Outstanding principal balance         15,000,000.0 15,000,000.0  
Outstanding Final Fee         700,000 700,000  
Total contractual payments         15,713,000 15,713,000  
Net carrying value         $ 14,071,000 $ 14,071,000  
Loan and security agreement | Term B loan              
Debt Instrument [Line Items]              
Remaining borrowing capacity     7,500,000        
Funding based on ability to obtain equity or subordinated debt financing and the achievement of certain clinical milestones     35,000,000.0        
Cash balance requirement     5,000,000.0        
Loan and security agreement | Term C loan              
Debt Instrument [Line Items]              
Remaining borrowing capacity     7,500,000        
Funding based on ability to obtain equity or subordinated debt financing and the achievement of certain clinical milestones     $ 35,000,000.0        
Subsequent Event [Member]              
Debt Instrument [Line Items]              
Net proceeds from the offering       $ 51,700,000      
Registered Direct Offering [Member] | Subsequent Event [Member]              
Debt Instrument [Line Items]              
Net proceeds from the offering       5,000,000.0      
Underwritten Offering | Subsequent Event [Member]              
Debt Instrument [Line Items]              
Net proceeds from the offering   $ 46,700,000   $ 46,700,000      
Minimum [Member] | Loan and security agreement              
Debt Instrument [Line Items]              
Prepayment fee     1.00%        
Maximum [Member] | Loan and security agreement              
Debt Instrument [Line Items]              
Prepayment fee     3.00%        
Forecast | Loan and security agreement              
Debt Instrument [Line Items]              
Exit fee $ 600,000