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Summary of Significant Accounting Policies (Details Narrative) - USD ($) $ / shares in Units, $ in Thousands |  | 12 Months Ended |
--- | --- | --- | ---
Jun. 15, 2017 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Administrative expense |  | $ 350 | $ 2,329 | $ 4,719 |
Sales and marketing expenses |  | 1,700 | 5,400 | 7,400 |
Research and development discontinued operation |  | 51 | 218 | 738 |
Working capital |  | 27,800 |  |  |
Marketable securities, available for sale |  | $ 18,765 |  |  |
Debt maturity date | Jun. 15, 2017 | Mar. 31, 2019 |  |  |
Unrealized loss on marketable securities |  | $ 78 |  |  |
Adjustments to reduce inventory for excess or obsolete inventory |  | 1,100 | 1,600 |  |
Cash and cash equivalents |  | 3,173 | 441 | 1,664 | $ 2,926
Bank balance |  | 3,300 |  |  |
Amount of bank balance covered by federal depository insurance |  | 500 |  |  |
Amount of bank balance uninsured |  | 2,800 |  |  |
Allowance for bad debt |  |  |  |  |
Net sales |  | 9,867 | 4,206 | 2,518 |
Provision for sales allowances |  | 2 | 0 |  |
Estimated sales returns |  | 480 | 1,200 |  |
Prepaid expenses and other current assets |  | $ 143 | 263 |  |
Stock issued price per share |  | $ 0.005 |  |  |
Stock option exercisable period |  | 10 years |  |  |
Share-based compensation expense |  | $ 78 | 1 | 135 |
Research and development |  | 431 | 358 | 340 |
Continued Operations [Member] |  |  |  |  |
Advertising and incentive promotion expenses |  | 45 | 717 | 1 |
Discontinued Operations [Member] |  |  |  |  |
Advertising and incentive promotion expenses |  | 2,800 | 7,500 | 6,900 |
Research and development |  | 52 | 218 | 738 |
Cooperative Incentive [Member] |  |  |  |  |
Advertising and incentive promotion expenses |  | 200 | 1,500 |  |
Contract Manufacturing [Member] |  |  |  |  |
Net sales |  | 9,867 | 4,206 | 2,518 |
Retail Customers [Member] |  |  |  |  |
Net sales |  | 201 | 67 | $ 86 |
TK Supplements [Member] |  |  |  |  |
Adjustments to reduce inventory for excess or obsolete inventory |  | 541 | 383 |  |
Cold-EEZE® Business [Member] |  |  |  |  |
Adjustments to reduce inventory for excess or obsolete inventory |  |  | $ 606 |  |
Marketable Securities 1 [Member] |  |  |  |  |
Investment in marketable securities |  | $ 16,000 |  |  |
Investment in securities term |  | 1 year |  |  |
Marketable Securities 1 [Member] | Minimum [Member] |  |  |  |  |
Interest rate |  | 0.87% |  |  |
Marketable Securities 1 [Member] | Maximum [Member] |  |  |  |  |
Interest rate |  | 3.12% |  |  |
Marketable Securities 2 [Member] |  |  |  |  |
Investment in marketable securities |  | $ 2,800 |  |  |
Marketable securities, description |  | maturity dates between one and two years |  |  |
Marketable Securities 2 [Member] | Minimum [Member] |  |  |  |  |
Interest rate |  | 1.97% |  |  |
Marketable Securities 2 [Member] | Maximum [Member] |  |  |  |  |
Interest rate |  | 2.31% |  |  |

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