Annual report pursuant to Section 13 and 15(d)

Benefit Plans (Details)

v3.4.0.3
Benefit Plans (Details) - Westell [Member] - USD ($)
$ in Millions
12 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Mar. 31, 2014
Defined Benefit Plan Disclosure [Line Items]      
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent 100.00%    
Defined Contribution Plan, Employer Matching Contribution, Percent of Match 50.00%    
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay 4.00%    
Defined Contribution Plan, Employer Discretionary Contribution Amount $ 0.4 $ 0.3 $ 0.1