Quarterly report pursuant to Section 13 or 15(d)

Borrowings - Additional Information (Detail)

v3.22.1
Borrowings - Additional Information (Detail)
1 Months Ended 3 Months Ended
May 13, 2021
USD ($)
Tranche
Apr. 09, 2020
USD ($)
Mar. 07, 2019
USD ($)
d
$ / shares
Jan. 31, 2021
USD ($)
shares
Mar. 31, 2022
USD ($)
Mar. 31, 2021
USD ($)
Dec. 31, 2021
USD ($)
Jun. 30, 2021
USD ($)
Debt Instrument [Line Items]                
Face amount         $ 36,383,000      
Loss on extinguishment of debt         0 $ 2,725,000    
Net carrying amount of convertible debt and derivative liability         10,817,000   $ 11,607,000  
Amortization of debt issuance costs and discount         390,000 256,000    
Deferred offering costs         124,000   150,000  
Repayment of deferred fee, 2023         0      
Repayment of deferred fee, 2024         23,874,000      
Repayment of deferred fee, 2025         11,126,000      
Other Liabilities                
Debt Instrument [Line Items]                
Deferred offering costs         $ 4,100,000   3,300,000  
Interest rate, deferred fees         12.75%      
Percentage of repayment of deferred fee, 2023         15.00%      
Percentage of repayment of deferred fee, 2024         50.00%      
Percentage of repayment of deferred fee, 2025         35.00%      
Repayment of deferred fee, 2023         $ 700,000      
Repayment of deferred fee, 2024         2,100,000      
Repayment of deferred fee, 2025         1,500,000      
Success premium         0 0    
SVB                
Debt Instrument [Line Items]                
Minimum outstanding term loan principal percentage for financial covenant waived 50.00%              
Loan and Security Agreement                
Debt Instrument [Line Items]                
Fair value of loan payable         $ 33,100,000   29,200,000  
Loan and Security Agreement | Level 3 Inputs | Secured Spread                
Debt Instrument [Line Items]                
Debt instrument, measurement input         9.63      
Loan and Security Agreement | Level 3 Inputs | Risk Free Rate                
Debt Instrument [Line Items]                
Debt instrument, measurement input         2.44      
Loan and Security Agreement | Level 3 Inputs | Secured Yield                
Debt Instrument [Line Items]                
Debt instrument, measurement input         12.07      
Term Loan | Loan and Security Agreement                
Debt Instrument [Line Items]                
Notes maturity date Mar. 03, 2025              
Basis spread on variable rate (as a percent) 9.05%              
Debt instrument maturity date subject to occurrence of certain conditions May 01, 2025              
Term Loan | Loan and Security Agreement | Prime Rate                
Debt Instrument [Line Items]                
Basis spread on variable rate (as a percent) 5.80%              
Term Loan | Loan and Security Agreement | Hercules Capital Inc. and Silicon Valley Bank                
Debt Instrument [Line Items]                
Face amount $ 60,000,000.0              
Number of available tranches | Tranche 4              
Initial Tranche of Term Loan | Loan and Security Agreement                
Debt Instrument [Line Items]                
Additional borrowing amount available $ 20,000,000.0              
Second Tranche of Term Loan                
Debt Instrument [Line Items]                
Face amount               $ 10,000,000.0
Second Tranche of Term Loan | Loan and Security Agreement                
Debt Instrument [Line Items]                
Additional borrowing amount available 10,000,000.0              
Third Tranche of Term Loan                
Debt Instrument [Line Items]                
Face amount         $ 5,000,000.0      
Third Tranche of Term Loan | Loan and Security Agreement                
Debt Instrument [Line Items]                
Additional borrowing amount available 5,000,000.0              
Fourth Tranche of Term Loan | Loan and Security Agreement                
Debt Instrument [Line Items]                
Additional borrowing amount available 25,000,000.0              
Increment debt amount $ 5,000,000.0              
April 2020 Note Purchase Agreement                
Debt Instrument [Line Items]                
Face amount   $ 10,000,000.0            
Date of issuance and sale of notes   Apr. 09, 2020            
Proceeds from debt, net of issuance costs   $ 9,500,000            
Payment of debt issuance costs   $ 500,000            
Conversion of convertible note, amount       $ 6,000,000.0        
Conversion of convertible note exchanged for shares | shares       959,080        
Loss on extinguishment of debt       $ 2,700,000        
Net carrying amount of convertible debt and derivative liability       4,800,000        
Fair value of the consideration issued       $ 7,500,000        
Senior Convertible Note Purchase Agreement                
Debt Instrument [Line Items]                
Face amount     $ 16,000,000.0          
Notes maturity date     Mar. 15, 2025          
Date of issuance and sale of notes     Mar. 07, 2019          
Proceeds from debt, net of issuance costs     $ 14,700,000          
Payment of debt issuance costs     $ 1,300,000          
Senior convertible notes         10,400,000   10,200,000  
Unamortized debt issuance cost         300,000      
Bifurcated embedded conversion option derivative liability         400,000   1,400,000  
Derivative, fair value         7,000,000.0      
Gain on fair value adjustment of derivative liability         1,000,000.0 42,000    
Amortization of debt issuance costs and discount         200,000 $ 300,000    
Fair value of convertible debt and derivative liability         $ 10,900,000   $ 12,300,000  
Purchase price as percentage of principal amount     100.00%          
Interest rate     6.00%          
Payment terms         The March 2019 Notes bear interest at a rate of 6.0% per annum payable semiannually in arrears on March 15 and September 15 of each year, beginning September 15, 2019. The March 2019 Notes will mature on March 15, 2025, unless earlier converted, redeemed or repurchased.      
Conversion terms         holder of the March 2019 Notes may convert their March 2019 Notes at their option at any time prior to the close of business on the business day immediately preceding March 15, 2025 into shares of the Company’s common stock.      
Conversion rate, number of shares to be issued per $1000 of principal (in shares)     73.9096          
Principal amount of notes used as the denominator for conversion into notes     $ 1,000          
Initial conversion price of notes | $ / shares     $ 13.53          
Conversion rate, number of shares to be issued per $1000 of principal (in shares) after adjustment to certain events     81          
Principal amount of notes used as the denominator for conversion into notes after adjustment of certain events     $ 1,000          
Convertible notes, redemption start date     Mar. 15, 2022          
Convertible notes, threshold percentage of stock price trigger     130.00%          
Convertible notes, threshold trading days | d     20          
Convertible notes, threshold consecutive trading days | d     30          
Redemption price as percentage of the principal amount     100.00%          
Redemption price as percentage of the principal amount subject to certain exceptions     100.00%