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Patent Finance Obligation - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
0 Months Ended 12 Months Ended 0 Months Ended
Oct. 19, 2012
Dec. 31, 2014
Jun. 18, 2013
Sep. 13, 2013
Jun. 26, 2014
Dec. 31, 2013
Aug. 01, 2014
Jul. 31, 2014
Debt Instrument [Line Items]                
Current portion of obligation   $ 17,418us-gaap_LongTermDebtCurrent       $ 19,480us-gaap_LongTermDebtCurrent    
Long term portion of obligation   27,465us-gaap_LongTermDebtNoncurrent       32,552us-gaap_LongTermDebtNoncurrent    
Debt instrument, maturity date Oct. 18, 2017 Jun. 18, 2023            
Patent Rights Finance Obligation, Due June 18, 2023 [Member]                
Debt Instrument [Line Items]                
Discount rate     6.00%us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate
/ us-gaap_LongtermDebtTypeAxis
= wiln_PatentRightsObligationDueJuneEighteenTwentyTwentyThreeMember
         
Current portion of obligation   4,271us-gaap_LongTermDebtCurrent
/ us-gaap_LongtermDebtTypeAxis
= wiln_PatentRightsObligationDueJuneEighteenTwentyTwentyThreeMember
           
Long term portion of obligation   13,120us-gaap_LongTermDebtNoncurrent
/ us-gaap_LongtermDebtTypeAxis
= wiln_PatentRightsObligationDueJuneEighteenTwentyTwentyThreeMember
           
Patent Finance Obligation, Due August 18, 2018 [Member]                
Debt Instrument [Line Items]                
Discount rate       4.50%us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate
/ us-gaap_LongtermDebtTypeAxis
= wiln_PatentFinanceObligationDueAugustEighteenTwentyEighteenMember
       
Current portion of obligation   4,792us-gaap_LongTermDebtCurrent
/ us-gaap_LongtermDebtTypeAxis
= wiln_PatentFinanceObligationDueAugustEighteenTwentyEighteenMember
           
Long term portion of obligation   14,345us-gaap_LongTermDebtNoncurrent
/ us-gaap_LongtermDebtTypeAxis
= wiln_PatentFinanceObligationDueAugustEighteenTwentyEighteenMember
           
Discount payment stream       1,389us-gaap_DebtInstrumentPeriodicPayment
/ us-gaap_LongtermDebtTypeAxis
= wiln_PatentFinanceObligationDueAugustEighteenTwentyEighteenMember
       
Patent Finance Obligation, Due August 18, 2018 [Member] | Secured Term Debt [Member]                
Debt Instrument [Line Items]                
Secured term debt, term       5 years        
Patent Finance Obligation, Due November 26, 2015 [Member]                
Debt Instrument [Line Items]                
Discount rate         4.75%us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate
/ us-gaap_LongtermDebtTypeAxis
= wiln_PatentFinanceObligationDueNovemberTwentySixTwentyFifteenMember
     
Current portion of obligation   8,355us-gaap_LongTermDebtCurrent
/ us-gaap_LongtermDebtTypeAxis
= wiln_PatentFinanceObligationDueNovemberTwentySixTwentyFifteenMember
           
Discount payment stream         2,143us-gaap_DebtInstrumentPeriodicPayment
/ us-gaap_LongtermDebtTypeAxis
= wiln_PatentFinanceObligationDueNovemberTwentySixTwentyFifteenMember
     
Secured term debt, term         2 years      
Initial payment             12,000wiln_DebtInstrumentInitialPayment
/ us-gaap_LongtermDebtTypeAxis
= wiln_PatentFinanceObligationDueNovemberTwentySixTwentyFifteenMember
2,143wiln_DebtInstrumentInitialPayment
/ us-gaap_LongtermDebtTypeAxis
= wiln_PatentFinanceObligationDueNovemberTwentySixTwentyFifteenMember
Patents [Member]                
Debt Instrument [Line Items]                
Discount rate   16.50%us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_PatentsMember
           
Discount payment stream   $ 688wiln_LongTermDebtDiscount
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_PatentsMember
           
Effective interest rate   4.75%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_PatentsMember