SEGMENTS (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013 segment	Mar. 31, 2012
SEGMENTS
Number of operating segments			1
SEGMENTS
Net sales attributed to customers in the United States	$ 48,743	$ 47,207	$ 92,124	$ 88,634
Net sales attributed to customers in Foreign countries	7,840	6,664	14,203	11,865
Net sales	56,583	53,871	106,327	100,499
Branded nutritional supplements and other natural products
SEGMENTS
Net sales	51,516	49,591	96,520	93,125
Other
SEGMENTS
Net sales	$ 5,067	$ 4,280	$ 9,807	$ 7,374

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

Reference 1: 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

Reference 2: 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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration