| **Note 4 - Credit Facility** | 3 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
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| Debt Disclosure [Text Block] | 4.           CREDIT      FACILITYThe Company has a      credit facility with a U.S. bank which expires on December      29, 2012. The credit facility provides for a $1.5 million      revolving line of credit (“revolver”) with an      advance rate of up to 80% of eligible accounts receivable. At      March 31, 2012 available borrowings were approximately $1.5      million based on this formula and no borrowings were      outstanding. The revolver under the credit facility bears      interest at Prime +1.75%.The credit      facility is collateralized by the Company’s assets,      except for (i) its intellectual property rights which are      subject to a negative pledge arrangement with the bank, and      (ii) any equipment whose purchase is financed by any other      lender or lessor, solely to the extent the security agreement      with such lender or lessor prohibits junior liens on such      equipment, and only until the lien held by such lender or      lessor is terminated or released with respect to such      equipment. The Company is required to maintain financial      covenants based on an adjusted quick ratio of at least 1.2 to      1.0, measured at each month end, and minimum tangible net      worth of $18.5 million, increased by 60% of the sum of the      gross proceeds received by the Company from any sale of its      equity or incurrence of subordinated debt and any positive      quarterly net income earned, measured at quarter end (both as      defined as per the credit facility). As is usual and      customary in such lending agreements, the agreements also      contain certain nonfinancial requirements, such as required      periodic reporting to the bank and various representations      and warranties. The lending agreement also restricts our      ability to pay dividends without the bank’s consent.      The Company has been in compliance with all debt covenants      since inception of the credit facility.In 2009, the      Company borrowed to finance capital equipment under the then      existing credit facility which resulted in a term loan of      $977 thousand payable over 36 months in equal monthly      installments of principal plus accrued interest. Interest      expense related to the term loan was $1 thousand and $6      thousand for the quarter ended March 31, 2012 and 2011,      respectively. At March 31, 2012, $0.05 million remained      outstanding and this term loan is scheduled to be paid in      full in May 2012. |

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| - Definition
The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20,22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.
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