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Goodwill and Intangible Assets (Details Textual) (USD $)
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3 Months Ended | 12 Months Ended | |||||||
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Dec. 31, 2014
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Sep. 30, 2014
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Mar. 31, 2015
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Mar. 31, 2014
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Mar. 31, 2013
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Sep. 01, 2014
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| Goodwill [Line Items] | |||||||||
| Goodwill | $ 0us-gaap_Goodwill | $ 31,102,000us-gaap_Goodwill | [1] | $ 0us-gaap_Goodwill | |||||
| Goodwill impairment | 20,547,000us-gaap_GoodwillImpairmentLoss | 10,555,000us-gaap_GoodwillImpairmentLoss | 31,102,000us-gaap_GoodwillImpairmentLoss | 2,884,000us-gaap_GoodwillImpairmentLoss | |||||
| Finite-Lived Intangible Assets, Net | 25,942,000us-gaap_FiniteLivedIntangibleAssetsNet | 32,319,000us-gaap_FiniteLivedIntangibleAssetsNet | [1] | ||||||
| Indefinite-lived Intangible Assets, Impairment Losses | 0us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill | 0us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill | |||||||
| Intangible amortization | 6,377,000us-gaap_AmortizationOfIntangibleAssets | 4,889,000us-gaap_AmortizationOfIntangibleAssets | [1] | 887,000us-gaap_AmortizationOfIntangibleAssets | |||||
| Impairment of Intangible Assets (Excluding Goodwill) | 100,000us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill | ||||||||
| Minimum [Member] | |||||||||
| Goodwill [Line Items] | |||||||||
| Finite-Lived Intangible Asset, Useful Life | 2 years | ||||||||
| Maximum [Member] | |||||||||
| Goodwill [Line Items] | |||||||||
| Finite-Lived Intangible Asset, Useful Life | 10 years | ||||||||
| Product Technology [Member] | |||||||||
| Goodwill [Line Items] | |||||||||
| Finite-Lived Intangible Assets, Net |
7,864,000us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TechnologyBasedIntangibleAssetsMember |
9,864,000us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TechnologyBasedIntangibleAssetsMember |
[1] | ||||||
| Product Technology [Member] | Noran Tel [Member] | |||||||||
| Goodwill [Line Items] | |||||||||
| Impairment of Intangible Assets, Finite-lived |
200,000us-gaap_ImpairmentOfIntangibleAssetsFinitelived / us-gaap_BusinessAcquisitionAxis = wstl_NoranTelMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TechnologyBasedIntangibleAssetsMember |
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| Finite-Lived Intangible Assets, Net |
200,000us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_BusinessAcquisitionAxis = wstl_NoranTelMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TechnologyBasedIntangibleAssetsMember |
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| Finite-Lived Intangible Asset, Useful Life | 2 years | ||||||||
| IBW [Member] | |||||||||
| Goodwill [Line Items] | |||||||||
| Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount |
13.00%us-gaap_ReportingUnitPercentageOfFairValueInExcessOfCarryingAmount / us-gaap_StatementBusinessSegmentsAxis = wstl_IBWMember |
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| Goodwill |
20,500,000us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = wstl_IBWMember |
0us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = wstl_IBWMember |
0us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = wstl_IBWMember |
0us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = wstl_IBWMember |
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| Goodwill impairment |
$ 20,547,000us-gaap_GoodwillImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = wstl_IBWMember |
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- Definition
The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. No definition available.
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- Definition
Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of an intangible asset (excluding goodwill) to fair value. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Percentage of fair value of reporting unit in excess of carrying amount. No definition available.
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