Quarterly report pursuant to Section 13 or 15(d)

Share Repurchases (Details Textual)

v2.4.1.9
Share Repurchases (Details Textual) (Class A Common Stock, USD $)
In Millions, except Share data, unless otherwise specified
9 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Aug. 31, 2011
August 2011 authorization [Member]
     
Share Repurchases (Textual) [Abstract]      
Stock Repurchase Program     $ 20.0us-gaap_StockRepurchaseProgramAuthorizedAmount1
/ us-gaap_PlanNameAxis
= wstl_AugustTwoThousandElevenAuthorizationMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
Treasury Stock, Shares, Acquired 0us-gaap_TreasuryStockSharesAcquired
/ us-gaap_PlanNameAxis
= wstl_AugustTwoThousandElevenAuthorizationMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
0us-gaap_TreasuryStockSharesAcquired
/ us-gaap_PlanNameAxis
= wstl_AugustTwoThousandElevenAuthorizationMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
 
Stock Repurchase Program Remaining Authorized Repurchases Amount $ 0.1wstl_StockRepurchaseProgramRemainingAuthorizedRepurchasesAmount
/ us-gaap_PlanNameAxis
= wstl_AugustTwoThousandElevenAuthorizationMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
   
Outside of Publically Announced Repurchase Program [Member]
     
Share Repurchases (Textual) [Abstract]      
Treasury Stock, Shares, Acquired 219,518us-gaap_TreasuryStockSharesAcquired
/ us-gaap_PlanNameAxis
= wstl_OutsideOfPublicallyAnnouncedRepurchaseProgramMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
152,874us-gaap_TreasuryStockSharesAcquired
/ us-gaap_PlanNameAxis
= wstl_OutsideOfPublicallyAnnouncedRepurchaseProgramMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
 
Treasury stock acquired volume weighted-average price $ 3.16us-gaap_TreasuryStockAcquiredAverageCostPerShare
/ us-gaap_PlanNameAxis
= wstl_OutsideOfPublicallyAnnouncedRepurchaseProgramMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
2.08us-gaap_TreasuryStockAcquiredAverageCostPerShare
/ us-gaap_PlanNameAxis
= wstl_OutsideOfPublicallyAnnouncedRepurchaseProgramMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember