Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Details Textual)

v2.4.1.9
Stock-Based Compensation (Details Textual) (USD $)
3 Months Ended 9 Months Ended
Dec. 31, 2014
Dec. 31, 2014
Stock-Based Compensation (Textual) [Abstract]    
Vesting schedule of equal annual installments over four years   4 years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value   $ 1.27us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
IncrementalStockbasedCompensationExpenseDuetoModification $ 70,000wstl_IncrementalStockbasedCompensationExpenseDuetoModification $ 158,000wstl_IncrementalStockbasedCompensationExpenseDuetoModification
Minimum [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Potential PSU attainment range   0.00%wstl_PotentialPSUattainmentrange
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Maximum [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Potential PSU attainment range   200.00%wstl_PotentialPSUattainmentrange
/ us-gaap_RangeAxis
= us-gaap_MaximumMember