Segments of Business (Summary of Operations by Business Unit) (Details) - USD ($) $ in Thousands	3 Months Ended
Jan. 01, 2016	Jan. 02, 2015	Oct. 02, 2015
Segment Reporting Information [Line Items]
Net sales	$ 85,298	$ 70,822
Operating profit (loss)	(900)	(7,331)
Total assets (end of period)	321,474	305,921	$ 299,204
Eliminations [Member]
Segment Reporting Information [Line Items]
Net sales	(338)	(115)
Eliminations [Member] \| Marine Electronics [Member]
Segment Reporting Information [Line Items]
Net sales	42	14
Eliminations [Member] \| Outdoor Equipment [Member]
Segment Reporting Information [Line Items]
Net sales	8	9
Eliminations [Member] \| Watercraft [Member]
Segment Reporting Information [Line Items]
Net sales	5	7
Eliminations [Member] \| Diving [Member]
Segment Reporting Information [Line Items]
Net sales	283	85
Operating Segments [Member] \| Marine Electronics [Member]
Segment Reporting Information [Line Items]
Net sales	58,558	43,529
Operating profit (loss)	5,695	(1,587)
Total assets (end of period)	153,785	136,022	125,113
Operating Segments [Member] \| Outdoor Equipment [Member]
Segment Reporting Information [Line Items]
Net sales	6,306	6,373
Operating profit (loss)	(202)	(345)
Total assets (end of period)	32,311	32,800	33,663
Operating Segments [Member] \| Watercraft [Member]
Segment Reporting Information [Line Items]
Net sales	6,373	5,448
Operating profit (loss)	(535)	(1,026)
Total assets (end of period)	23,760	23,293	20,898
Operating Segments [Member] \| Diving [Member]
Segment Reporting Information [Line Items]
Net sales	14,009	15,429
Operating profit (loss)	(1,874)	(336)
Total assets (end of period)	68,058	65,984	62,589
Operating Segments [Member] \| Other / Corporate [Member]
Segment Reporting Information [Line Items]
Net sales	52	43
Operating profit (loss)	(3,984)	(4,037)
Total assets (end of period)	$ 43,560	$ 47,822	$ 56,941

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 FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.18)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 12
-Article 7

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 18
-Article 5

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+ References

Reference 1: 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=26872669&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 1
-Article 5

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