Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Details 1)

v3.8.0.1
Stock-Based Compensation (Details 1) - Employee Stock Option [Member] - USD ($)
$ / shares in Units, $ in Thousands
 9 Months Ended 12 Months Ended
Dec. 31, 2017
Mar. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Outstanding on March 31, 2017 362,396  
Granted 100,000  
Exercised 0  
Forfeited (199,483)  
Expired (61,018)  
Outstanding on December 31, 2017 201,895 362,396
Weighted-Average Exercise Price Per Share, Outstanding on March 31, 2017 $ 4.89  
Weighted-Average Exercise Price Per Share, Granted 3.06  
Weighted-Average Exercise Price Per Share, Exercised 0.00  
Weighted-Average Exercise Price Per Share, Forfeited 3.72  
Weighted-Average Exercise Price Per Share, Expired 5.82  
Weighted-Average Exercise Price Per Share, Outstanding on December 31, 2017 $ 4.86 $ 4.89
Weighted-Average Remaining Contractual Term (in years), Outstanding on March 31, 2017 4 years 7 months 13 days 5 years 4 months 24 days
Weighted-Average Remaining Contractual Term (in years), Outstanding on December 31, 2017 4 years 7 months 13 days 5 years 4 months 24 days
Aggregate Intrinsic Value, Outstanding on March 31, 2017 [1] $ 39  
Aggregate Intrinsic Value, Outstanding on December 31, 2017 [1] $ 76 $ 39
[1] The intrinsic value for the stock options is calculated based on the difference between the exercise price of the underlying awards and the Westell Technologies’ closing stock price as of the respective reporting date