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Notes Payable - Term Loan Agreement - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
1 Months Ended 6 Months Ended
Feb. 28, 2022
Dec. 31, 2016
Jun. 30, 2022
Dec. 31, 2019
Debt Instrument [Line Items]        
Debt maturity date     Dec. 30, 2023  
Common Stock [Member]        
Debt Instrument [Line Items]        
Number of shares issuable for warrants outstanding (in shares)   528,958   568,291
Exercise price of warrants   $ 1.55   $ 1.55
CRG [Member] | Term Loan Agreement [Member]        
Debt Instrument [Line Items]        
Debt maturity date Dec. 30, 2023   Dec. 30, 2023  
Proceeds from issuance of long-term debt   $ 40.0    
Debt term (in years)   6 years    
Debt instrument, term of interest-only payments (in years)   4 years    
Final fee as a percentage of the principal outstanding (as a percent)   8.00% 10.00% 10.00%
Annual fixed rate (as a percent)   11.50%    
Deferred interest rate (as a percent)   3.50%    
Debt instrument, prepayment fee term (in years)   5 years    
Minimum cash balance     $ 5.0  
Additional interest rate, event of default (as a percent)     4.00%