Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements (Details 1)

v2.4.1.9
Fair Value Measurements (Details 1) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Fair value measurement of contingent consideration    
Contingent cash consideration $ 3,500us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh $ 3,500us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh
FairValueInputsWorkingCapitalAdjustment (444)wstl_FairValueInputsWorkingCapitalAdjustment (444)wstl_FairValueInputsWorkingCapitalAdjustment
FairValueInputsWarrantyClaimAdjustment $ (303)wstl_FairValueInputsWarrantyClaimAdjustment $ (303)wstl_FairValueInputsWarrantyClaimAdjustment
Discount rate 6.30%us-gaap_FairValueInputsDiscountRate 7.50%us-gaap_FairValueInputsDiscountRate
Approximate timing of cash flows 1 year 4 months 10 days 1 year 4 months 10 days