Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

Document and Entity Information
9 Months Ended
Dec. 31, 2012
Jan. 14, 2013
Class A Common Stock
Jan. 14, 2013
Class B Common Stock
Document Type 10-Q    
Amendment Flag false    
Document Period End Date Dec. 31, 2012    
Document Fiscal Year Focus 2013    
Document Fiscal Period Focus Q3    
Entity Registrant Name WESTELL TECHNOLOGIES INC    
Entity Central Index Key 0001002135    
Current Fiscal Year End Date --03-31    
Entity Filer Category Accelerated Filer    
Entity Common Stock, Shares Outstanding   44,952,226 13,937,151