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Long-term Debt - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Apr. 20, 2020
Dec. 31, 2021
Dec. 31, 2020
Jun. 29, 2018
Long-term Debt, Gross   $ 35,000 $ 35,000  
Orbi Med [Member]        
Long-term Debt, Gross       $ 35,000
Description of variable rate basis   London Interbank Offered Rate (“LIBOR”), subject to a minimum of 1.0% and a maximum of 4.0%    
Basis spread on variable rate   8.50%    
Interest rate effective percentage   9.50% 9.50%  
Final payment   3.00%    
Description of covenants   The financial covenants include maintaining a minimum liquidity amount of $3.0 million; the requirement, on an annual basis, to deliver to OrbiMed annual audited financial statements with an unqualified audit opinion from the Company’s independent registered public accounting firm; and restrictions on the Company’s activities, including limitations on dispositions, mergers or acquisitions; encumbering its intellectual property; incurring indebtedness or liens; paying dividends; making certain investments; and engaging in certain other business transactions.    
Minimum liquidity covenant amount   $ 3,000    
Average effective interest rate   11.20% 11.20%  
Orbi Med [Member] | In Event Of Default [Member]        
Increasing applicable margin   4.00%    
Orbi Med [Member] | Credit Agreement [Member]        
Debt Instrument Maturity Month And Year   2023-06    
Orbi Med [Member] | Minimum [Member]        
Paid in kind interest threshold   11.50%    
Orbi Med [Member] | Maximum [Member]        
Interest rate effective percentage   11.50%    
Paid in kind interest threshold   12.50%    
Orbi Med [Member] | London Interbank Offered Rate (LIBOR) | Minimum [Member]        
LIBOR Rate   1.00%    
Orbi Med [Member] | London Interbank Offered Rate (LIBOR) | Maximum [Member]        
LIBOR Rate   4.00%    
Bankof America [Member] | Promissory Note [Member] | Paycheck Protection Program [Member]        
Loan proceeds $ 2,200      
Fixed interest rate 1.00%      
Repayment date May 01, 2020      
Maturity date Apr. 20, 2022