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Supplemental Information - Summary of Statements of Certain Statements of Cash Flows Amounts (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Condensed Financial Information Disclosure [Abstract]        
Cash and cash equivalents $ 13,823 $ 17,299 $ 58,610  
Restricted cash 499 393 388  
Non-current restricted cash 99 597 1,040  
Cash, cash equivalents, and restricted cash 14,421 18,289 60,038 $ 95,288
Short-term investments 0 11,698 0  
Total 14,421 29,987 60,038  
Non-cash additions to land, buildings, and equipment 691 0 414  
Receivable from Jefferies for shares issued under ATM Facility 260      
Interest paid $ 1,425 $ 1,455 $ 1,472