Annual report pursuant to Section 13 and 15(d)

Cover
- Document and Entity Information
Financial Statements
Notes to Financial Statements
Accounting Policies
- Summary of Significant Accounting Policies (Policies)
Notes Tables
Notes Details

Restructuring Charge (Details Textual)

v3.4.0.3

Restructuring Charge (Details Textual)	3 Months Ended								12 Months Ended
Restructuring Charge (Details Textual)	Mar. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Sep. 30, 2014 USD ($)	Jun. 30, 2014 USD ($)	Mar. 31, 2016 USD ($)	Mar. 31, 2015 USD ($) employees	Mar. 31, 2014 USD ($) employees	Mar. 31, 2013 USD ($)
Restructuring Charge (Textual) [Abstract]
Restructuring	$ 731,000	$ 0	$ 0	$ 17,000	$ 3,188,000	$ 0	$ (2,000)	$ 57,000	$ 748,000	$ 3,243,000	$ 335,000
Accrued restructuring	1,537,000				1,161,000				1,537,000	1,161,000
Accrued restructuring non-current	550,000				1,642,000				550,000	1,642,000
Payments for Restructuring									1,479,000	425,000	284,000
Unpaid balance of restructuring charges	2,087,000				2,803,000				2,087,000	$ 2,803,000	$ 57,000	$ 6,000
4Q16 Restructuring [Member]
Restructuring Charge (Textual) [Abstract]
Restructuring	700,000
4Q15 Restructuring [Member]
Restructuring Charge (Textual) [Abstract]
Restructuring and Related Cost, Number of Positions Eliminated \| employees										17
Restructuring					3,200,000
Impairment of Leasehold					2,700,000
Kentrox [Member]
Restructuring Charge (Textual) [Abstract]
Restructuring and Related Cost, Number of Positions Eliminated \| employees											12
Restructuring										$ 55,000	$ 335,000
Payments for Restructuring											278,000
Cumulative Restructuring									390,000
Employee Related Restructuring Cost [Member]
Restructuring Charge (Textual) [Abstract]
Restructuring									674,000	337,000	335,000
Accrued restructuring											57,000
Payments for Restructuring									263,000	379,000	284,000
Unpaid balance of restructuring charges	441,000				15,000				441,000	15,000	57,000	6,000
Other Restructuring Costs [Member]
Restructuring Charge (Textual) [Abstract]
Restructuring									74,000	2,906,000
Payments for Restructuring									1,216,000	46,000
Unpaid balance of restructuring charges	$ 1,646,000				$ 2,788,000				$ 1,646,000	$ 2,788,000	$ 0	$ 0

- Definition

The adjustment to reduce the value of existing agreements that specify the lessee's rights to use the leased property. This expense is charged when the estimates of future profits generated by the leased property are reduced.

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- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
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-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
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Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
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-Section 50
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Carrying amount as of the balance sheet date of known and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid after one year or beyond the next operating cycle, if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

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- Definition

Cumulative restructuring charges.

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- Definition

Restructuring charge.

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