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Basis of Presentation (Details Textual) (USD $)
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3 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 12 Months Ended | 12 Months Ended | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Sep. 30, 2012
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Mar. 31, 2014
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Mar. 31, 2013
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Mar. 31, 2012
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Apr. 02, 2013
Kentrox [Member]
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Mar. 02, 2014
CSI [Member]
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Dec. 31, 2012
CNS [Member]
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Mar. 31, 2014
CNS [Member]
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Mar. 31, 2013
CNS [Member]
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Mar. 31, 2012
CNS [Member]
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Apr. 15, 2011
CNS [Member]
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Mar. 31, 2014
ConferencePlus [Member]
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Mar. 31, 2013
ConferencePlus [Member]
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Mar. 31, 2012
ConferencePlus [Member]
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Dec. 31, 2011
ConferencePlus [Member]
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Mar. 31, 2013
Westell [Member]
CNS [Member]
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Mar. 31, 2014
Westell [Member]
ConferencePlus [Member]
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Mar. 31, 2014
Arkadin [Member]
ConferencePlus [Member]
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Mar. 31, 2013
Netgear [Member]
CNS [Member]
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| Business Acquisition [Line Items] | |||||||||||||||||||
| Business Acquisition, Percentage of Voting Interests Acquired | 100.00% | 100.00% | |||||||||||||||||
| Sale of conference plus | $ 40,300,000 | ||||||||||||||||||
| Escrow deposit made | 3,400,000 | 4,100,000 | |||||||||||||||||
| Loss Contingency, Loss in Period | 1,500,000 | ||||||||||||||||||
| Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax | (45,000) | (2,309,000) | 5,777,000 | (45,000) | (951,000) | 2,268,000 | (1,358,000) | 3,509,000 | |||||||||||
| Escrow Deposit Released | 2,500,000 | 1,600,000 | 2,600,000 | 3,000,000 | 1,100,000 | 900,000 | |||||||||||||
| Gain on sales of discontinued operations, net of tax expense of $25,013 | 39,489,000 | 19,000,000 | 20,489,000 | ||||||||||||||||
| Proceeds from CNS asset sale | 36,729,000 | 36,700,000 | |||||||||||||||||
| Litigation Settlement, Amount | 900,000 | ||||||||||||||||||
| Loss Contingency Accrual, at Carrying Value | 400,000 | ||||||||||||||||||
| Additional expense related to CNS claim | 534,000 | 500,000 | |||||||||||||||||
| Prior Period Reclassification Adjustment | $ 2,700,000 | ||||||||||||||||||