Benefit Plans (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended	9 Months Ended		12 Months Ended
Benefit Plans (Details) - USD ($) $ in Thousands	Mar. 31, 2014	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Mar. 31, 2015
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			$ 300
Kentrox [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent				75.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Match				50.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay				6.00%
Defined Contribution Plan, Employer Discretionary Contribution Amount				$ 100
CSI [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent			100.00%
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 16		$ 200
Deferred Compensation Arrangement with Individual, Employer Contribution			3.00%