Segments of Business (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Dec. 28, 2012	Dec. 30, 2011	Sep. 28, 2012
Segment Reporting Information [Line Items]
Net sales	$ 87,274	$ 80,176
Operating profit (loss)	1,526	(3,719)
Total assets	300,362	270,725	263,632
Marine Electronics [Member]
Segment Reporting Information [Line Items]
Interunit transfers	19	21
Operating profit (loss)	4,746	2,073
Unaffiliated customers	53,632	47,750
Total assets	124,792	122,509	97,261
Outdoor Equipment [Member]
Segment Reporting Information [Line Items]
Interunit transfers	7	17
Operating profit (loss)	224	(252)
Unaffiliated customers	8,433	6,273
Total assets	40,956	17,157	26,978
Watercraft [Member]
Segment Reporting Information [Line Items]
Interunit transfers	7	10
Operating profit (loss)	(1,682)	(2,458)
Unaffiliated customers	6,807	7,475
Total assets	34,970	35,838	32,766
Diving [Member]
Segment Reporting Information [Line Items]
Interunit transfers	136	138
Operating profit (loss)	702	(98)
Unaffiliated customers	18,347	18,620
Total assets	70,839	68,087	70,957
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Operating profit (loss)	(2,464)	(2,984)
Unaffiliated customers	55	58
Total assets	28,805	27,134	35,670
Intersegment Elimination [Member]
Segment Reporting Information [Line Items]
Interunit transfers	$ (169)	$ (186)

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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

-Publisher SEC

-Name Regulation S-X (SX)

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

-Publisher FASB

-Name Statement of Financial Accounting Concepts (CON)

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-Paragraph 25

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 3: http://www.xbrl.org/2003/role/presentationRef

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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Aggregate revenue recognized during the period (derived from goods sold, services rendered, insurance premiums, or other activities that constitute an entity's earning process). For financial services companies, also includes investment and interest income, and sales and trading gains.

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

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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.

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