Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Summary of Contractual Obligations (Detail)

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Commitments and Contingencies - Summary of Contractual Obligations (Detail)
$ in Thousands
Dec. 31, 2018
USD ($)
Contractual Obligation Fiscal Year Maturity Schedule [Line Items]  
Total $ 574
Less than 1 year 207
1-3 years 298
3-5 years 69
Seattle Office Operating Lease [Member]  
Contractual Obligation Fiscal Year Maturity Schedule [Line Items]  
Total 317
Less than 1 year 144
1-3 years 173
Vancouver Office Operating Lease - Expiring [Member]  
Contractual Obligation Fiscal Year Maturity Schedule [Line Items]  
Total 7
Less than 1 year 7
Vancouver Office Operating Lease - New [Member]  
Contractual Obligation Fiscal Year Maturity Schedule [Line Items]  
Total 250
Less than 1 year 56
1-3 years 125
3-5 years $ 69