Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation (Details 1)

v2.4.0.6
Stock-Based Compensation (Details 1) (2004 Stock Incentive Plan [Member], Stock Options [Member], USD $)
In Thousands, except Share data, unless otherwise specified
12 Months Ended
Mar. 31, 2013
Mar. 31, 2012
2004 Stock Incentive Plan [Member] | Stock Options [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]    
Shares, Outstanding on March 31, 2012 2,254,103  
Shares, Exercised (157,807)  
Shares, Granted 340,000  
Shares, Forfeited (80,440)  
Shares, Expired (241,410)  
Shares, Outstanding on March 31, 2013 2,114,446 2,254,103
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number 2,089,420  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number 1,650,683  
Weighted-Average Exercise Price Per Share, Outstanding on March 31, 2012 $ 2.04  
Weighted-Average Exercise Price Per Share, Granted $ 2.15  
Weighted-Average Exercise Price Per Share, Exercised $ 0.55  
Weighted-Average Exercise Price Per Share, Forfeited $ 2.06  
Weighted-Average Exercise Price Per Share, Expired $ 2.90  
Weighted-Average Exercise Price Per Share, Outstanding on March 31, 2013 $ 2.07 $ 2.04
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price $ 2.07  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price $ 2.15  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term 2 years 9 months 18 days 3 years 3 months 18 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term 2 years 9 months 18 days  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term 2 years 2 months 12 days  
Aggregate Intrinsic Value, Outstanding on March 31, 2012 $ 1,483 [1]  
Aggregate Intrinsic Value, Outstanding on March 31, 2013 868 [1] 1,483 [1]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value 867 [1]  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value $ 726 [1]  
[1] The intrinsic value for the stock options is calculated based on the difference between the exercise price of the underlying awards and the average of the high and low Westell Technologies’ stock price as of the reporting date.