Annual report pursuant to Section 13 and 15(d)

Basis of Presentation (Details Textual)

v3.4.0.3
Basis of Presentation (Details Textual) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2013
Mar. 31, 2012
Dec. 31, 2011
Business Acquisition [Line Items]            
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax $ 444 $ 227 $ (45)      
ConferencePlus [Member]            
Business Acquisition [Line Items]            
Sale of conference plus           $ 40,300
Escrow deposit made           $ 4,100
Loss Contingency, Loss in Period       $ 1,500    
Escrow Deposit Released     2,500 $ 1,600    
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax 444 227 0      
CNS [Member]            
Business Acquisition [Line Items]            
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax $ 0 $ 0 (45)      
Proceeds from CNS asset sale         $ 36,700  
Westell [Member] | ConferencePlus [Member]            
Business Acquisition [Line Items]            
Escrow Deposit Released     3,000      
Arkadin [Member] | ConferencePlus [Member]            
Business Acquisition [Line Items]            
Escrow Deposit Released     $ 1,100