Quarterly report pursuant to Section 13 or 15(d)

Share Repurchases Share Repurchases (Details)

v2.4.1.9
Share Repurchases Share Repurchases (Details) (August Two Thousand Eleven Authorization [Member], Class A Common Stock)
9 Months Ended
Dec. 31, 2014
Dec. 31, 2013
August Two Thousand Eleven Authorization [Member] | Class A Common Stock
   
Payments for Repurchase of Equity [Abstract]    
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