SEGMENTS (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2015 segment	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
SEGMENTS
Number of operating segments	1
SEGMENTS
Net sales	$ 55,404	$ 54,859	$ 108,448	$ 106,409
Branded nutritional supplements and other natural products
SEGMENTS
Net sales	49,883	49,503	97,760	96,475
Other
SEGMENTS
Net sales	5,521	5,356	10,688	9,934
United States
SEGMENTS
Net sales	48,807	46,962	95,532	92,285
Foreign countries
SEGMENTS
Net sales	$ 6,597	$ 7,897	$ 12,916	$ 14,124