ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2015 USD ($) Region Period	Dec. 31, 2014 USD ($)
ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Abstract]
Number of regions in which company sells products | Region	3
Cash and Cash Equivalents [Abstract]
Credit card receivables	$ 2,400	$ 1,200
Cash and cash equivalents held in foreign bank accounts	27,900	24,800
Restricted Cash [Abstract]
Restricted cash	8,800	8,600
Accounts Receivable [Abstract]
Allowance for doubtful accounts	200	200
Other Assets [Abstract]
Other assets	4,033	3,567
Deposits for building leases	2,000	1,500
Fair trade commission deposits	1,600	1,700
Indefinite lived intangible assets	200	200
Other Long-Term Liabilities [Abstract]
Other long-term liabilities	2,167	2,136
Uncertain income tax position	800	700
Accrued lease restoration costs	400	400
Estimated defined benefit obligation related to a non-U.S. defined benefit plan for its Japan operations	600	600
Revenue Recognition and Deferred Commissions [Abstract]
Deferred revenue	9,770	10,890
Deferred revenue associated loyalty program	7,900	9,700
Deferred commissions	4,152	4,544
Loyalty Program [Abstract]
Loyalty deferred revenue, beginning balance	9,703	5,456
Loyalty points forfeited or expired	(5,310)	(4,664)
Loyalty points used	(7,123)	(12,348)
Loyalty points vested	6,432	19,580
Loyalty points unvested	4,167	1,679
Loyalty deferred revenue, ending balance	$ 7,869	9,703
Percentage of sale returns (in hundredths)	1.50%
Commissions and Incentives [Abstract]
Number of business periods per year | Period	13
Number of days per business period	28 days
Number of weeks following business period end for payment of product sales commissions
Number of weeks following business period end for payment of pack sales commissions
Reserve for Sales Returns [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Sales reserve, beginning of year	$ 207
Provision related to sales made in current period	828
Adjustment related to sales made in prior periods	(28)
Actual returns or credits related to current period	(632)
Actual returns or credits related to prior periods	(172)
Sales reserve, end of period	$ 203	$ 207