Quarterly report pursuant to Section 13 or 15(d)

Interim Segment Information (Details)

v2.4.1.9
Interim Segment Information (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Dec. 31, 2014
Sep. 30, 2014
Dec. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Segment information          
Revenue $ 14,043us-gaap_SalesRevenueNet   $ 25,236us-gaap_SalesRevenueNet $ 65,514us-gaap_SalesRevenueNet $ 77,652us-gaap_SalesRevenueNet
Cost of revenue 9,648us-gaap_CostOfGoodsAndServicesSold   13,304us-gaap_CostOfGoodsAndServicesSold [1] 43,370us-gaap_CostOfGoodsAndServicesSold 45,281us-gaap_CostOfGoodsAndServicesSold [1]
Gross profit 4,395us-gaap_GrossProfit   11,932us-gaap_GrossProfit [1] 22,144us-gaap_GrossProfit 32,371us-gaap_GrossProfit [1]
Gross margin 31.30%wstl_GrossMargin   47.30%wstl_GrossMargin 33.80%wstl_GrossMargin 41.70%wstl_GrossMargin
Research and development 4,353us-gaap_ResearchAndDevelopmentExpense   2,527us-gaap_ResearchAndDevelopmentExpense 13,128us-gaap_ResearchAndDevelopmentExpense 7,845us-gaap_ResearchAndDevelopmentExpense
Segment profit (loss) 42wstl_SegmentProfitLoss   9,405wstl_SegmentProfitLoss 9,016wstl_SegmentProfitLoss 24,526wstl_SegmentProfitLoss
Operating expenses:          
Sales and marketing 2,719us-gaap_SellingAndMarketingExpense   3,205us-gaap_SellingAndMarketingExpense [1] 9,064us-gaap_SellingAndMarketingExpense 9,749us-gaap_SellingAndMarketingExpense [1]
General and administrative 2,797us-gaap_GeneralAndAdministrativeExpense   3,402us-gaap_GeneralAndAdministrativeExpense 9,131us-gaap_GeneralAndAdministrativeExpense 10,200us-gaap_GeneralAndAdministrativeExpense
Intangible amortization 1,562us-gaap_AmortizationOfIntangibleAssets   737us-gaap_AmortizationOfIntangibleAssets 4,857us-gaap_AmortizationOfIntangibleAssets 3,588us-gaap_AmortizationOfIntangibleAssets
Restructuring 0us-gaap_RestructuringCharges   38us-gaap_RestructuringCharges 55us-gaap_RestructuringCharges 273us-gaap_RestructuringCharges
Goodwill impairment 20,547us-gaap_GoodwillImpairmentLoss 10,555us-gaap_GoodwillImpairmentLoss   31,102us-gaap_GoodwillImpairmentLoss  
Operating income (loss) (27,583)us-gaap_OperatingIncomeLoss   2,023us-gaap_OperatingIncomeLoss (45,193)us-gaap_OperatingIncomeLoss 716us-gaap_OperatingIncomeLoss
Other income (expense), net (29)us-gaap_OtherNonoperatingIncomeExpense   (31)us-gaap_OtherNonoperatingIncomeExpense 16us-gaap_OtherNonoperatingIncomeExpense (63)us-gaap_OtherNonoperatingIncomeExpense
Income tax benefit (expense) 72us-gaap_IncomeTaxExpenseBenefit   (38)us-gaap_IncomeTaxExpenseBenefit 170us-gaap_IncomeTaxExpenseBenefit (125)us-gaap_IncomeTaxExpenseBenefit
Net income (loss) from continuing operations (27,540)us-gaap_IncomeLossFromContinuingOperations   1,954us-gaap_IncomeLossFromContinuingOperations (45,007)us-gaap_IncomeLossFromContinuingOperations 528us-gaap_IncomeLossFromContinuingOperations
CSG [Member]          
Segment information          
Revenue 8,629us-gaap_SalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_CSGMember
  23,425us-gaap_SalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_CSGMember
34,882us-gaap_SalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_CSGMember
72,774us-gaap_SalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_CSGMember
Cost of revenue 6,144us-gaap_CostOfGoodsAndServicesSold
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_CSGMember
  12,037us-gaap_CostOfGoodsAndServicesSold
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_CSGMember
24,827us-gaap_CostOfGoodsAndServicesSold
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_CSGMember
41,977us-gaap_CostOfGoodsAndServicesSold
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_CSGMember
Gross profit 2,485us-gaap_GrossProfit
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_CSGMember
  11,388us-gaap_GrossProfit
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_CSGMember
10,055us-gaap_GrossProfit
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_CSGMember
30,797us-gaap_GrossProfit
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_CSGMember
Gross margin 28.80%wstl_GrossMargin
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_CSGMember
  48.60%wstl_GrossMargin
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_CSGMember
28.80%wstl_GrossMargin
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_CSGMember
42.30%wstl_GrossMargin
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_CSGMember
Research and development 2,011us-gaap_ResearchAndDevelopmentExpense
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_CSGMember
  2,347us-gaap_ResearchAndDevelopmentExpense
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_CSGMember
6,488us-gaap_ResearchAndDevelopmentExpense
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_CSGMember
7,292us-gaap_ResearchAndDevelopmentExpense
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_CSGMember
Segment profit (loss) 474wstl_SegmentProfitLoss
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_CSGMember
  9,041wstl_SegmentProfitLoss
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_CSGMember
3,567wstl_SegmentProfitLoss
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_CSGMember
23,505wstl_SegmentProfitLoss
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_CSGMember
Operating expenses:          
Goodwill impairment   10,555us-gaap_GoodwillImpairmentLoss
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_CSGMember
     
IBW [Member]          
Segment information          
Revenue 5,414us-gaap_SalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_IBWMember
  1,811us-gaap_SalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_IBWMember
30,632us-gaap_SalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_IBWMember
4,878us-gaap_SalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_IBWMember
Cost of revenue 3,504us-gaap_CostOfGoodsAndServicesSold
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_IBWMember
  1,267us-gaap_CostOfGoodsAndServicesSold
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_IBWMember
18,543us-gaap_CostOfGoodsAndServicesSold
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_IBWMember
3,304us-gaap_CostOfGoodsAndServicesSold
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_IBWMember
Gross profit 1,910us-gaap_GrossProfit
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_IBWMember
  544us-gaap_GrossProfit
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_IBWMember
12,089us-gaap_GrossProfit
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_IBWMember
1,574us-gaap_GrossProfit
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_IBWMember
Gross margin 35.30%wstl_GrossMargin
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_IBWMember
  30.00%wstl_GrossMargin
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_IBWMember
39.50%wstl_GrossMargin
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_IBWMember
32.30%wstl_GrossMargin
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_IBWMember
Research and development 2,342us-gaap_ResearchAndDevelopmentExpense
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_IBWMember
  180us-gaap_ResearchAndDevelopmentExpense
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_IBWMember
6,640us-gaap_ResearchAndDevelopmentExpense
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_IBWMember
553us-gaap_ResearchAndDevelopmentExpense
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_IBWMember
Segment profit (loss) (432)wstl_SegmentProfitLoss
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_IBWMember
  364wstl_SegmentProfitLoss
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_IBWMember
5,449wstl_SegmentProfitLoss
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_IBWMember
1,021wstl_SegmentProfitLoss
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_IBWMember
Operating expenses:          
Goodwill impairment $ 20,547us-gaap_GoodwillImpairmentLoss
/ us-gaap_StatementBusinessSegmentsAxis
= wstl_IBWMember
       
[1] Certain amounts have been reclassified to reflect a change in accounting principle. See Note 1.