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ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $)
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6 Months Ended |
12 Months Ended |
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Dec. 31, 2013
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Dec. 31, 2014
Business
Plan
Region
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Dec. 31, 2013
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Dec. 31, 2012
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| ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Abstract] |
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| Number of regions in which company sells products |
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3 |
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| Foreign Currency Translation [Abstract] |
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|
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| Transaction gains (losses) |
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$ (3,000,000) |
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$ (900,000) |
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| Cash and Cash Equivalents [Abstract] |
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|
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| Credit card receivables |
600,000 |
1,200,000 |
|
600,000 |
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| Cash and cash equivalents held in foreign bank accounts |
14,700,000 |
24,800,000 |
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14,700,000 |
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| Restricted Cash [Abstract] |
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|
|
|
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| Restricted cash |
5,800,000 |
8,600,000 |
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5,800,000 |
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| Accounts Receivables [Abstract] |
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|
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| Allowance for doubtful accounts |
100,000 |
200,000 |
|
100,000 |
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| Accounts receivable, net |
100,000 |
200,000 |
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100,000 |
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| Other Assets [Abstract] |
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|
|
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| Other assets |
3,591,000 |
3,567,000 |
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3,591,000 |
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| Deposits for building leases |
1,400,000 |
1,500,000 |
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1,400,000 |
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| Fair trade commission deposits |
1,800,000 |
1,700,000 |
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1,800,000 |
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| Indefinite lived intangible assets |
200,000 |
200,000 |
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200,000 |
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| Other Long-Term Liabilities [Abstract] |
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| Accrued lease restoration costs |
200,000 |
400,000 |
|
200,000 |
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| Defined benefit plan obligation |
(629,000) |
(549,000) |
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(629,000) |
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| Other long-term liabilities |
2,092,000 |
2,136,000 |
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2,092,000 |
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| Financing obligation in noncurrent liabilities |
200,000 |
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|
200,000 |
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| Uncertain income tax positions recorded in noncurrent liabilities |
700,000 |
700,000 |
|
700,000 |
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| Revenue Recognition [Abstract] |
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|
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| Deferred revenue |
6,400,000 |
10,900,000 |
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6,400,000 |
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| Deferred commissions |
2,706,000 |
4,544,000 |
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2,706,000 |
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| Percentage of sale returns (in hundredths) |
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1.50% |
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| Loyalty Program [Abstract] |
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| Loyalty deferred revenue, beginning balance |
0 |
5,456,000 |
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|
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| Loyalty points forfeited |
(1,136,000) |
(4,664,000) |
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|
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| Loyalty points used |
(723,000) |
(12,348,000) |
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| Loyalty points vested |
5,072,000 |
19,580,000 |
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| Loyalty points unvested |
2,243,000 |
1,679,000 |
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| Loyalty deferred revenue, ending balance |
5,456,000 |
9,703,000 |
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5,456,000 |
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| Shipping and Handling Costs [Abstract] |
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| Revenue from freight and shipping fees |
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7,400,000 |
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7,700,000 |
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| Freight costs |
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6,700,000 |
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6,800,000 |
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| Commissions and Incentives Expenses [Abstract] |
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| Number of business periods per year |
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13 |
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| Number of days per business period |
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28 days |
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| Number of weeks following business period end for payment of product sales commissions |
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3 |
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| Number of weeks following business period end for payment of pack sales commissions |
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5 |
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| Advertising Expenses [Abstract] |
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| Advertising and promotional expense |
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4,900,000 |
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4,300,000 |
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| Research and Development Expenses [Abstract] |
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|
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| Research and development consulting fees |
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1,600,000 |
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1,600,000 |
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| Stock-Based Compensation [Abstract] |
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| Number of active stock based compensation plan |
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1 |
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| Option contract term |
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P10Y |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Percentages of stock option ownership considered for higher exercise price of option (in hundredths) |
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10.00% |
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| Option exercise price as percentages of closing exercise price of stock for specific shareholders (in hundredths) |
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110.00% |
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| Expiration period of stock option plan |
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5 years |
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| Concentration Risk [Line Items] |
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|
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| Concentration risk, sales by product |
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98,647,000 |
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84,203,000 |
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| Concentration risk, percentage of net sales (in hundredths) |
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51.90% |
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47.50% |
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| Advanced Ambrotose [Member] |
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|
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| Concentration Risk [Line Items] |
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| Concentration risk, sales by product |
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63,791,000 |
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59,894,000 |
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| Concentration risk, percentage of net sales (in hundredths) |
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33.60% |
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33.70% |
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| Ambrotose [Member] |
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| Concentration Risk [Line Items] |
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|
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| Concentration risk, sales by product |
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10,895,000 |
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10,939,000 |
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| Concentration risk, percentage of net sales (in hundredths) |
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5.70% |
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6.20% |
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| Uth Skin Rejuvenation [Member] |
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|
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| Concentration Risk [Line Items] |
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| Concentration risk, sales by product |
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13,431,000 |
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2,406,000 |
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| Concentration risk, percentage of net sales (in hundredths) |
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7.10% |
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1.40% |
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| NutriVerus [Member] |
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|
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| Concentration Risk [Line Items] |
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|
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| Concentration risk, sales by product |
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10,530,000 |
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10,964,000 |
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| Concentration risk, percentage of net sales (in hundredths) |
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5.50% |
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6.20% |
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| Reserve for Sales Returns [Member] |
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|
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| Movement in Valuation Allowances and Reserves [Roll Forward] |
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| Balance at beginning of year |
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238,000 |
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|
156,000 |
| Provision related to sales made in current period |
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1,618,000 |
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| Adjustment related to sales made in prior periods |
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10,000 |
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| Actual returns or credits related to current period |
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(1,411,000) |
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| Actual returns or credits related to prior periods |
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(248,000) |
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| Balance at end of year |
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$ 207,000 |
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$ 156,000 |
| Minimum [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Vesting period of stock options |
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2 years |
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| Minimum [Member] | Software [Member] |
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| Finite-Lived Intangible Assets [Line Items] |
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| Estimated useful life of software |
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3 years |
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| Maximum [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Vesting period of stock options |
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3 years |
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| Maximum [Member] | Software [Member] |
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| Finite-Lived Intangible Assets [Line Items] |
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| Estimated useful life of software |
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5 years |
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| Office Furniture and Equipment [Member] | Minimum [Member] |
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| Property, Plant and Equipment [Line Items] |
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| Estimated useful lives of assets |
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5 years |
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| Office Furniture and Equipment [Member] | Maximum [Member] |
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| Property, Plant and Equipment [Line Items] |
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| Estimated useful lives of assets |
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7 years |
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| Computer Hardware and Software [Member] | Minimum [Member] |
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| Property, Plant and Equipment [Line Items] |
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| Estimated useful lives of assets |
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3 years |
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| Computer Hardware and Software [Member] | Maximum [Member] |
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| Property, Plant and Equipment [Line Items] |
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| Estimated useful lives of assets |
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5 years |
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| Automobiles [Member] | Minimum [Member] |
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| Property, Plant and Equipment [Line Items] |
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| Estimated useful lives of assets |
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3 years |
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| Automobiles [Member] | Maximum [Member] |
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| Property, Plant and Equipment [Line Items] |
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| Estimated useful lives of assets |
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5 years |
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| Leasehold Improvements [Member] | Minimum [Member] |
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| Property, Plant and Equipment [Line Items] |
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| Estimated useful lives of assets |
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2 years |
[1] |
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| Leasehold Improvements [Member] | Maximum [Member] |
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| Property, Plant and Equipment [Line Items] |
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| Estimated useful lives of assets |
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10 years |
[1] |
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