ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $)	3 Months Ended		6 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Sep. 30, 2014 Period Region	Sep. 30, 2013
ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Abstract]
Number of regions in which company sells products				3
Cash and Cash Equivalents [Abstract]
Credit card receivables	$ 3,100,000		$ 600,000	$ 3,100,000
Cash and cash equivalents held in foreign bank accounts	25,400,000		14,700,000	25,400,000
Restricted Cash [Abstract]
Restricted cash	8,900,000		5,800,000	8,900,000
Accounts Receivable [Abstract]
Allowance for doubtful accounts	300,000		100,000	300,000
Other Assets [Abstract]
Other assets	3,726,000		3,591,000	3,726,000
Deposits for building leases	1,600,000		1,400,000	1,600,000
Fair trade commission deposits	1,800,000		1,800,000	1,800,000
Indefinite lived intangible assets	200,000		200,000	200,000
Other Long-Term Liabilities [Abstract]
Other long-term liabilities	2,184,000		2,101,000	2,184,000
Uncertain income tax position	700,000		700,000	700,000
Accrued lease restoration costs	400,000		200,000	400,000
Estimated defined benefit obligation related to a non-U.S. defined benefit plan for its Japan operations	600,000		600,000	600,000
Revenue Recognition and Deferred Commissions [Abstract]
Deferred revenue	12,800,000		6,400,000	12,800,000
Deferred revenue associated with the loyalty program	9,806,000		5,456,000	9,806,000
Deferred commissions	5,094,000		2,706,000	5,094,000
Loyalty Program [Abstract]
Loyalty deferred revenue, beginning balance		0	0	5,456,000
Loyalty points forfeited			(1,136,000)	(3,392,000)
Loyalty points applied			(723,000)	(8,616,000)
Loyalty points vested			5,072,000	14,529,000
Loyalty points unvested			2,243,000	1,829,000
Loyalty deferred revenue, ending balance	9,806,000		5,456,000	9,806,000
Percentage of sale returns (in hundredths)				1.50%
Shipping and Handling Costs [Abstract]
Revenue from freight and shipping fees	1,900,000	1,900,000		5,700,000	5,700,000
Freight costs	1,800,000	1,700,000		5,100,000	5,000,000
Commissions and Incentives [Abstract]
Number of business periods per year				13
Number of days per business period				28 days
Number of weeks following business period end for payment of product sales commissions				Three weeks
Number of weeks following business period end for payment of pack sales commissions				Five weeks
Commissions and Incentives Expense	20,977,000	19,640,000		57,727,000	56,362,000
Reserve for Sales Returns [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Sales reserve, beginning of year				238,000
Provision related to sales made in current period				1,149,000
Adjustment related to sales made in prior periods				10,000
Actual returns or credits related to current period				(916,000)
Actual returns or credits related to prior periods				(249,000)
Sales reserve, end of period	$ 232,000			$ 232,000