Annual report pursuant to Section 13 and 15(d)

Goodwill and Intangible Assets (Details Textual)

v2.4.0.8
Goodwill and Intangible Assets (Details Textual) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Mar. 31, 2013
Mar. 31, 2014
Mar. 31, 2013
Mar. 31, 2012
Goodwill [Line Items]        
Goodwill impairment $ 2,900    $ 2,884  
Finite-Lived Intangible Assets, Net 5,063 32,356 5,063  
Indefinite-lived Intangible Assets, Impairment Losses   0 0 0
Intangible amortization   4,908 887 544
Westell [Member]
       
Goodwill [Line Items]        
Goodwill impairment     2,884  
Minimum [Member]
       
Goodwill [Line Items]        
Finite-Lived Intangible Asset, Useful Life   1 month    
Maximum [Member]
       
Goodwill [Line Items]        
Finite-Lived Intangible Asset, Useful Life   10 years    
Product Technology [Member]
       
Goodwill [Line Items]        
Finite-Lived Intangible Assets, Net 2,832 9,830 2,832  
Product Technology [Member] | Noran Tel [Member]
       
Goodwill [Line Items]        
Impairment of Intangible Assets, Finite-lived   245    
Finite-Lived Intangible Assets, Net   $ 205    
Finite-Lived Intangible Asset, Useful Life   2 years