ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($) performance_obligation region	Dec. 31, 2019 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of regions in which company sells products | region	3
Credit card receivables	$ 1,600	$ 700
Cash and cash equivalents held in foreign bank accounts	16,600	18,200
ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Line Items]
Restricted cash	5,900	6,200
Accounts receivable, net of allowance	271	955
Allowance for doubtful accounts	700	700
Other assets	9,634	9,592
Deposits for building leases	2,000	2,200
Fair trade commission deposits	2,300	1,600
Indefinite lived intangible assets		200
Notes payable	1,300	1,100
Notes payable, current portion	1,039	739
Other long-term liabilities	5,937	6,214
Uncertain income tax position	200	200
Accrued lease restoration costs	300	300
Defined benefit plan obligation	300	300
Deferred commissions	1,789	1,758
Amortization of deferred commissions	1,300
Deferred revenue	5,223	4,416
Deferred revenue, revenue recognized during the period	3,900
Loyalty deferred revenue, ending balance	$ 3,043
Percentage of sale returns	1.50%
Revenue, performance obligations, term of services, online business tools	3 months
Revenue, number of performance obligations, online business tools | performance_obligation	3
Operating Lease, Right-of-Use Asset	$ 5,100
Operating Lease, Liability, Noncurrent	5,000
Accrued expenses	6,573	8,209
Accrued Employee Benefits, Current	1,600	2,300
Non-inventory accrual, current	2,000	2,200
Operating Lease, Liability, Current	1,400	1,700
Accrued Professional Fees	800	900
Other Accrued Liabilities, Current	700	1,200
South Korea
ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Line Items]
Net assets	$ 18,500	$ 19,200
Software Tools
ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	3 months
Associate Fees
ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	12 months