| **Note 1 - Summary of Significant Accounting Policies (Details) (USD $)**       | 12 Months Ended |             |
|---------------------------------------------------------------------------------|-----------------|-------------|
||
| **Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]**  |            |        |   |
| Maximum Maturity Term for Short Term Investments Considered as Cash Equivalents | 3 months        |        |   |
| Cash and Cash Equivalents, at Carrying Value                                    | $ 5,266,000     | $ 2,483,000 | $ 4,216,000 |
| Fair Value Percentage of Securities Sold                                        |            | 102.00%     |   |
| Percentage of Total Revenue Related to Group of Customers                       | 21.00%          | 35.00%      |   |
| Shipping and Handling Revenue                                                   | 100,000         | 100,000     |   |
| Advertising Expense                                                             | 50,000          | 74,000      |   |
| Foreign Currency Transaction Gain (Loss), before Tax                            | (36,000)        | 13,000      |   |
| Highly Liquid Investments in Overnight Purchase Agreements                      |            |        |   |
| **Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]**  |            |        |   |
| Cash and Cash Equivalents, at Carrying Value                                    | $ 3,900,000     | $ 1,700,000 |   |
| Minimum [Member]                                                                |            |        |   |
| **Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]**  |            |        |   |
| Deferred Reveune Recognition Period                                             | 1 year          |        |   |
| Maximum [Member]                                                                |            |        |   |
| **Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]**  |            |        |   |
| Deferred Reveune Recognition Period                                             | 3 years         |        |   |

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| - Definition
Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.
+ References
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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.
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Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.
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Fees charged to customers for the delivery, generally by postal or freight service providers, of product or goods purchased.
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