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Quarterly Results of Operations (unaudited) (Details Textual) (USD $)
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3 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 3 Months Ended | |||||
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Dec. 31, 2012
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Sep. 30, 2012
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Jun. 30, 2012
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Mar. 31, 2013
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Mar. 31, 2012
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Mar. 31, 2011
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Mar. 31, 2012
Noran Tel Restructuring [Member]
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Mar. 31, 2013
Noran Tel Restructuring [Member]
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Mar. 31, 2012
Noran Tel Restructuring [Member]
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Jun. 30, 2011
Cns Asset Sale [Member]
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| Effect of Fourth Quarter Events [Line Items] | ||||||||||
| Valuation Allowances and Reserves, Charged to Cost and Expense | $ 545,000 | |||||||||
| Restructuring Charges | 149,000 | 550,000 | 0 | 300,000 | 149,000 | 275,000 | 200,000 | |||
| Additional Contingency Expense | 534,000 | |||||||||
| Goodwill impairment | 0 | 0 | 0 | 2,884,000 | ||||||
| Loss Contingency, Loss in Period | 900,000 | |||||||||
| Income Tax Discrete Item | $ 300,000 | $ 600,000 | ||||||||
| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Loss recognized during the period that results from the write-down of goodwill after comparing the implied fair value of reporting unit goodwill with the carrying amount of that goodwill. Goodwill is assessed at least annually for impairment. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The amount of loss pertaining to the specified contingency that was charged against earnings in the period, including the effects of revisions in previously reported estimates. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding asset retirement obligations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, charged to costs and expenses. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Additional contingency expense. No definition available.
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| X | ||||||||||
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- Definition
Income tax discrete item. No definition available.
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