The number of major customers comprising 10% or more of the Company's net accounts receivable, as of the balance sheet date.

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- Definition

The number of major customers from which 10% or more of the Company's net revenues are earned.

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- Definition

Revenues from external customers attributed to the entity's country of domicile.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 131

-Paragraph 38

-Subparagraph a(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 280

-SubTopic 10

-Section 50

-Paragraph 41

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9038-108599

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- Definition

Revenues from external customers attributed to all foreign countries in total from which the entity derives revenues.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 131

-Paragraph 38

-Subparagraph a(2)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 280

-SubTopic 10

-Section 50

-Paragraph 41

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9038-108599

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Amount of revenue from external customers for the reportable segment. Such disclosure is presented if the amount is: (a) included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 131

-Paragraph 27

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 5

-Section 03

-Paragraph 1

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

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REVENUE AND MAJOR CUSTOMERS (Details) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended			3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended
	Sep. 30, 2011 USD ($) customers	Sep. 30, 2010 USD ($) customers	Sep. 30, 2011 USD ($) customers	Sep. 30, 2010 USD ($) customers	Mar. 31, 2011 customers	Sep. 30, 2011 Office and Contact Center [Member] USD ($)	Sep. 30, 2010 Office and Contact Center [Member] USD ($)	Sep. 30, 2011 Office and Contact Center [Member] USD ($)	Sep. 30, 2010 Office and Contact Center [Member] USD ($)	Sep. 30, 2011 Mobile [Member] USD ($)	Sep. 30, 2010 Mobile [Member] USD ($)	Sep. 30, 2011 Mobile [Member] USD ($)	Sep. 30, 2010 Mobile [Member] USD ($)	Sep. 30, 2011 Gaming and Computer Audio [Member] USD ($)	Sep. 30, 2010 Gaming and Computer Audio [Member] USD ($)	Sep. 30, 2011 Gaming and Computer Audio [Member] USD ($)	Sep. 30, 2010 Gaming and Computer Audio [Member] USD ($)	Sep. 30, 2011 Clarity [Member] USD ($)	Sep. 30, 2010 Clarity [Member] USD ($)	Sep. 30, 2011 Clarity [Member] USD ($)	Sep. 30, 2010 Clarity [Member] USD ($)	Sep. 30, 2011 U.S. [Member] USD ($)	Sep. 30, 2010 U.S. [Member] USD ($)	Sep. 30, 2011 U.S. [Member] USD ($)	Sep. 30, 2010 U.S. [Member] USD ($)	Sep. 30, 2011 Europe, Middle East and Africa [Member] USD ($)	Sep. 30, 2010 Europe, Middle East and Africa [Member] USD ($)	Sep. 30, 2011 Europe, Middle East and Africa [Member] USD ($)	Sep. 30, 2010 Europe, Middle East and Africa [Member] USD ($)	Sep. 30, 2011 Asia Pacific [Member] USD ($)	Sep. 30, 2010 Asia Pacific [Member] USD ($)	Sep. 30, 2011 Asia Pacific [Member] USD ($)	Sep. 30, 2010 Asia Pacific [Member] USD ($)	Sep. 30, 2011 Americas, excluding U.S. [Member] USD ($)	Sep. 30, 2010 Americas, excluding U.S. [Member] USD ($)	Sep. 30, 2011 Americas, excluding U.S. [Member] USD ($)	Sep. 30, 2010 Americas, excluding U.S. [Member] USD ($)
Revenue from External Customer [Line Items]
Net revenues from unaffiliated customers						$ 136,395	$ 117,951	$ 267,394	$ 235,531	$ 28,341	$ 27,581	$ 60,505	$ 66,238	$ 8,381	$ 8,179	$ 15,776	$ 17,504	$ 3,831	$ 4,544	$ 8,873	$ 9,667
Net revenues from unaffiliated customers, U.S.																						101,196	96,100	201,487	200,092
Net revenues from unaffiliated customers, international	75,752	62,155	151,061	128,848																						43,596	36,299	86,758	75,081	19,993	14,642	39,230	30,905	12,163	11,214	25,073	22,862
Net revenues	$ 176,948	$ 158,255	$ 352,548	$ 328,940
Number of Major Customers, Ten Percent Or Greater, Net Revenues	0	0	0	0
Number of Major Customers, Ten Percent Or Greater, Net Accounts Receivable	0		0		0