Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Additional Information (Detail)

v3.20.4
Commitments and Contingencies - Additional Information (Detail)
 12 Months Ended
Nov. 19, 2018
USD ($)
ft²
Dec. 11, 2017
ft²
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Mar. 01, 2018
USD ($)
Other Commitments [Line Items]            
Consolidated rent and facilities expense     $ 200,000 $ 200,000 $ 300,000  
Indemnification obligations     0      
Expenses related to indemnification issues     $ 0      
Vancouver Office Operating Lease [Member]            
Other Commitments [Line Items]            
Expiration of operating lease agreement     2019-01      
Vancouver Office Operating Lease [Member] | Vancouver, British Columbia [Member]            
Other Commitments [Line Items]            
Lease agreement commencement date Feb. 01, 2019          
Annual rent expense $ 100,000          
Area of office space leased | ft² 2,367          
Operating lease, term of contract 4 years          
Seattle Office Operating Lease [Member] | Pike [Member]            
Other Commitments [Line Items]            
Area of office space leased | ft²   3,187        
Lease agreement     On December 11, 2017, we entered into a lease, or the Seattle Lease, with 520 Pike Street, Inc., or Pike, pursuant to which we leased approximately 3,187 square feet located at Suite 2250 at 520 Pike Tower, Seattle, Washington, 98101, which commenced on March 1, 2018. The initial term of the Seattle Lease expired at the end of the February 2021 on the third anniversary of the Seattle Lease. This lease was not renewed.      
Monthly base rent           $ 11,685,000
Monthly base rent, maximum annual increase           12,397,000
Lease, security deposit, annual payment           37,192,000
Lease, security deposit payment, annual decrease           $ 12,397,000
Percentage of profit attributable to lessor     50.00%      
Percentage of property if subleased could result in lease termination     50.00%