Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Summary of Cash and Cash Equivalents (Detail)

v3.20.2
Fair Value Measurements - Summary of Cash and Cash Equivalents (Detail) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Cash, amortized cost and estimated fair value $ 1,383  
Cash and cash equivalents, amortized cost and estimated fair value 22,393 $ 16,664
Restricted cash, amortized cost and estimated fair value 50  
Money market securities [Member]    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Cash equivalents, amortized cost and estimated fair value 21,010  
Restricted cash, amortized cost and estimated fair value $ 50