ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) $ in Thousands	9 Months Ended				12 Months Ended
	Sep. 30, 2017 USD ($) service_element	Sep. 30, 2017 USD ($) service_element	Sep. 30, 2017 USD ($) service_element	Sep. 30, 2017 USD ($) Region service_element	Dec. 31, 2016 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of regions in which company sells products		3		3
Cash and Cash Equivalents [Abstract]
Credit card receivables	$ 3,200	$ 3,200	$ 3,200	$ 3,200	$ 500
Cash and cash equivalents held in foreign bank accounts	32,100	32,100	32,100	32,100	27,500
Restricted Cash [Abstract]
Restricted cash	8,300	8,300	8,300	8,300	7,900
Accounts Receivable [Abstract]
Allowance for doubtful accounts	600	600	600	600	500
Other Assets [Abstract]
Other assets	3,623	3,623	3,623	3,623	4,013
Deposits for building leases	1,800	1,800	1,800	1,800	2,200
Fair trade commission deposits	1,600	1,600	1,600	1,600	1,500
Indefinite lived intangible assets	200	200	200	200	200
Notes Payable [Abstract]
Notes payable	900	900	900	900	1,400
Notes payable, current portion	787	787	787	787	801
Notes payable, long-term portion	144	144	144	144	567
Other Long-Term Liabilities [Abstract]
Other long-term liabilities	1,385	1,385	1,385	1,385	1,465
Uncertain income tax position	200	200	200	200	200
Accrued lease restoration costs	500	500	500	500	600
Defined benefit plan obligation	$ 400	$ 400	$ 400	$ 400	500
Valuation and Qualifying Accounts Disclosure [Line Items]
Associate fees, number of service elements | service_element	3	3	3	3
Deferred revenue	$ 8,768	$ 8,768	$ 8,768	$ 8,768	8,156
Deferred commissions	$ 3,796	$ 3,796	3,796	$ 3,796	3,229
Loyalty Program [Roll Forward]
Loyalty deferred revenue, beginning balance			7,033		8,073
Loyalty points forfeited or expired			(4,808)		(6,963)
Loyalty points used			(10,577)		(15,451)
Loyalty points vested			12,418		20,085
Loyalty points unvested			2,050		1,289
Loyalty deferred revenue, ending balance			6,116		7,033
Customer returns, days after original sale date	90 days
Percentage of sale returns		1.50%
Reserve for Sales Returns
Movement in Valuation Allowances and Reserves [Roll Forward]
Sales reserve, beginning of year			129
Provision related to sales made in current period			922
Adjustment related to sales made in prior periods			3
Actual returns or credits related to current period			(793)
Actual returns or credits related to prior periods			(133)
Sales reserve, end of period			128		$ 129
NutraScoop, LLC
Valuation and Qualifying Accounts Disclosure [Line Items]
Consideration transferred, associate position			$ 800