Quarterly report pursuant to Section 13 or 15(d)

Document And Entity Information

Document And Entity Information
9 Months Ended
Dec. 31, 2011
Jan. 12, 2012
Class A Common Stock
Jan. 12, 2012
Class B Common Stock
Document Type 10-Q    
Amendment Flag false    
Document Period End Date Dec. 31, 2011    
Document Fiscal Period Focus Q3    
Entity Central Index Key 0001002135    
Entity Registrant Name WESTELL TECHNOLOGIES INC    
Current Fiscal Year End Date --03-31    
Document Fiscal Year Focus 2012    
Entity Filer Category Accelerated Filer    
Trading Symbol WSTL    
Entity Common Stock, Shares Outstanding   52,308,104 13,937,151