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Stockholders' Equity - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 20, 2019
Mar. 31, 2020
Mar. 31, 2019
Subsidiary Sale Of Stock [Line Items]      
Unregistered common stock exchanged for consulting services     $ 197
Compensation expense   $ 2,679 2,234
Shareholder Consulting Agreement [Member]      
Subsidiary Sale Of Stock [Line Items]      
Number of shares of unregistered common stock exchanged for consulting services 10,195    
Price per share $ 19.37    
Consulting services performance period 6 months    
Prepaid consulting services     197
Compensation expense     0
Additional Paid-In Capital [Member]      
Subsidiary Sale Of Stock [Line Items]      
Unregistered common stock exchanged for consulting services     197
Additional Paid-In Capital [Member] | Shareholder Consulting Agreement [Member]      
Subsidiary Sale Of Stock [Line Items]      
Unregistered common stock exchanged for consulting services     $ 197