Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

PATENT RIGHTS - Summary of Patent Rights (Detail)

v3.22.1
PATENT RIGHTS - Summary of Patent Rights (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Disclosure of detailed information about intangible assets [line items]    
Beginning balance $ 1,778 $ 1,602
Additions 385 319
Amortization expense (244) (97)
Impairment   (46)
Ending balance 1,919 1,778
Cost [Member]    
Disclosure of detailed information about intangible assets [line items]    
Beginning balance 2,130 1,857
Additions 385 319
Amortization expense
Impairment   (46)
Ending balance 2,515 2,130
Accumulated amortization [Member]    
Disclosure of detailed information about intangible assets [line items]    
Beginning balance (352) (255)
Additions
Amortization expense (244) (97)
Impairment  
Ending balance $ (596) $ (352)