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Financial Instruments - Additional Information (Detail)
In Thousands, unless otherwise specified
 12 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2014
USD ($)
Dec. 31, 2014
CAD
Dec. 31, 2013
USD ($)
Dec. 31, 2014
Foreign Exchange Forward Contracts [Member]
USD ($)
Dec. 31, 2014
Cash and Cash Equivalents [Member]
CAD
Dec. 31, 2014
Accounts Payable and Accrued Liabilities
CAD
Dec. 31, 2014
Cash And Cash Equivalents And Short-Term Investments And Accounts Receivable [Member]
CAD
Dec. 31, 2014
Canada [Member]
Prime Rate [Member]
Dec. 31, 2014
U.S. [Member]
Base Rate [Member]
Jan. 22, 2015
Subsequent Event
USD ($)
Dec. 31, 2014
Revenue from Rights Concentration Risk [Member]
Customer
Dec. 31, 2013
Revenue from Rights Concentration Risk [Member]
Customer
Dec. 31, 2014
Revenue from Rights Concentration Risk [Member]
Revenue, Rights Granted [Member]
Licensee One [Member]
Dec. 31, 2013
Revenue from Rights Concentration Risk [Member]
Revenue, Rights Granted [Member]
Licensee One [Member]
Dec. 31, 2014
Revenue from Rights Concentration Risk [Member]
Revenue, Rights Granted [Member]
Licensee Two [Member]
Dec. 31, 2013
Revenue from Rights Concentration Risk [Member]
Revenue, Rights Granted [Member]
Licensee Two [Member]
Dec. 31, 2014
Credit Concentration Risk [Member]
Customer
Dec. 31, 2013
Credit Concentration Risk [Member]
Customer
Dec. 31, 2014
Credit Concentration Risk [Member]
Accounts Receivable [Member]
Licensee One [Member]
Dec. 31, 2013
Credit Concentration Risk [Member]
Accounts Receivable [Member]
Licensee One [Member]
Dec. 31, 2013
Credit Concentration Risk [Member]
Accounts Receivable [Member]
Licensee Two [Member]
Dec. 31, 2013
Credit Concentration Risk [Member]
Accounts Receivable [Member]
Licensee Three [Member]
Dec. 31, 2014
Currency Denomination Concentration Risk [Member]
Cash And Cash Equivalents and Short Term Investments [Member]
Financing Receivable Recorded Investment Past Due [Line Items]                                              
Foreign exchange forward contracts held $ 17,700us-gaap_ForeignCurrencyContractAssetFairValueDisclosure                                            
Foreign exchange forward contracts, maturity date Oct. 31, 2015 Oct. 31, 2015                                          
Number of major licensees                     2wiln_ConcentrationRiskMajorCustomer
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_RevenueFromRightsConcentrationRiskMember		 2wiln_ConcentrationRiskMajorCustomer
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_RevenueFromRightsConcentrationRiskMember		         1wiln_ConcentrationRiskMajorCustomer
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CreditConcentrationRiskMember		 3wiln_ConcentrationRiskMajorCustomer
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CreditConcentrationRiskMember		          
Concentration risk percentage                         15.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_RevenueRightsGrantedMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_RevenueFromRightsConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= wiln_LicenseeOneMember		 20.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_RevenueRightsGrantedMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_RevenueFromRightsConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= wiln_LicenseeOneMember		 13.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_RevenueRightsGrantedMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_RevenueFromRightsConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= wiln_LicenseeTwoMember		 14.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_RevenueRightsGrantedMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_RevenueFromRightsConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= wiln_LicenseeTwoMember		     57.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CreditConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= wiln_LicenseeOneMember		 58.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CreditConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= wiln_LicenseeOneMember		 17.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CreditConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= wiln_LicenseeTwoMember		 10.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CreditConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= wiln_LicenseeThreeMember		 9.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= wiln_CashAndCashEquivalentsAndShortTermInvestmentsMember
/ us-gaap_ConcentrationRiskByTypeAxis
= wiln_CurrencyDenominationConcentrationRiskMember
Past due amount collected                   7wiln_FinancingReceivableRecordedInvestmentPastDueAmountCollected
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember		                          
Provision for doubtful debts 138us-gaap_ProvisionForDoubtfulAccounts   193us-gaap_ProvisionForDoubtfulAccounts                                        
Cash and cash equivalent and short-term investments 127,647us-gaap_CashCashEquivalentsAndShortTermInvestments                                            
Amount of credit facilities, available 8,000us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity                                            
Accounts receivable (Note 11) 2,198us-gaap_AccountsReceivableNetCurrent   11,999us-gaap_AccountsReceivableNetCurrent                                        
Amount of credit facilities, available for general corporate purposes   8,000us-gaap_LineOfCreditFacilityCapacityAvailableForTradePurchases                                          
Amount of credit facilities, available for foreign exchange facility   2,000us-gaap_LineOfCreditFacilityCapacityAvailableForSpecificPurposeOtherThanForTradePurchases                                          
Basis spread on variable rate               1.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_StatementGeographicalAxis
= stpr_CA
/ us-gaap_VariableRateAxis
= us-gaap_PrimeRateMember		 1.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_StatementGeographicalAxis
= country_US
/ us-gaap_VariableRateAxis
= us-gaap_BaseRateMember		                            
Borrowings under credit facility 0us-gaap_LineOfCredit                                            
One percent increase/decrease in interest rates resulting to investment income 1,276us-gaap_InvestmentIncomeInterest                                            
Revenues denominated value   0us-gaap_RevenuesAndGainsReportingCurrencyDenominatedValue                                          
Expenses denominated value   18,135us-gaap_ExpensesAndLossesReportingCurrencyDenominatedValue                                          
Fluctuations in foreign currency rates   18,135us-gaap_DifferenceBetweenReportedAmountAndReportingCurrencyDenominatedAmountValue         3,235us-gaap_DifferenceBetweenReportedAmountAndReportingCurrencyDenominatedAmountValue
/ us-gaap_InformationByFinancialStatementLineItemAxis
= wiln_CashAndCashEquivalentsAndShortTermInvestmentsAndAccountsReceivableMember		                                
Asset, Reporting currency denominated value         14,523us-gaap_AssetReportingCurrencyDenominatedValue
/ us-gaap_InformationByFinancialStatementLineItemAxis
= us-gaap_CashAndCashEquivalentsMember		                                    
Liabilities, Reporting currency denominated value           11,288us-gaap_LiabilityReportingCurrencyDenominatedValue
/ us-gaap_InformationByFinancialStatementLineItemAxis
= us-gaap_AccountsPayableAndAccruedLiabilitiesMember		                                  
One cent increase/decrease in foreign currency resulting comprehensive loss 24us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax                                            
Notional value       17,700invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_ForeignExchangeForwardMember		                                      
Foreign exchange forward contracts loss       $ 732us-gaap_DerivativeLossOnDerivative
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_ForeignExchangeForwardMember