Annual report pursuant to Section 13 and 15(d)

Benefit Plans Benefit Plans (Details)

v3.8.0.1
Benefit Plans Benefit Plans (Details) - USD ($)
12 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Defined Benefit Plan Disclosure [Line Items]    
Max dollar amount employer matches of the employee's contribution. $ 500  
Westell [Member]    
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 $ 100,000 $ 200,000