Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Summary of Contractual Obligations (Detail)

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Commitments and Contingencies - Summary of Contractual Obligations (Detail)
$ in Thousands
Sep. 30, 2018
USD ($)
Contractual Obligation Fiscal Year Maturity Schedule [Line Items]  
Total $ 384
Less than 1 year 175
1-3 years 209
Vancouver Office Operating Lease [Member]  
Contractual Obligation Fiscal Year Maturity Schedule [Line Items]  
Total 32
Less than 1 year 32
Seattle Office Operating Lease [Member]  
Contractual Obligation Fiscal Year Maturity Schedule [Line Items]  
Total 352
Less than 1 year 143
1-3 years $ 209