Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Summary of Future Minimum Lease Payments (Detail)

v2.4.1.9
Commitments and Contingencies - Summary of Future Minimum Lease Payments (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Vancouver, Canada  
Operating Leased Assets [Line Items]  
2015 $ 56us-gaap_OperatingLeasesFutureMinimumPaymentsRemainderOfFiscalYear
/ us-gaap_StatementGeographicalAxis
= country_CA
Total 56us-gaap_OperatingLeasesFutureMinimumPaymentsDue
/ us-gaap_StatementGeographicalAxis
= country_CA
Bothell, Washington  
Operating Leased Assets [Line Items]  
2015 144us-gaap_OperatingLeasesFutureMinimumPaymentsRemainderOfFiscalYear
/ us-gaap_StatementGeographicalAxis
= stpr_WA
2016 224us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears
/ us-gaap_StatementGeographicalAxis
= stpr_WA
Remainder 315us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter
/ us-gaap_StatementGeographicalAxis
= stpr_WA
Total $ 683us-gaap_OperatingLeasesFutureMinimumPaymentsDue
/ us-gaap_StatementGeographicalAxis
= stpr_WA