| **Note 7 - Credit Facility**         | 12 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
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| Line of Credit Facility, Description | 7.                    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 December 31, 2011 available borrowings were        approximately $1.5 million based on this formula. 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 $17 thousand and $38        thousand for the years ended December 31, 2011 and 2010,        respectively. The term loan is scheduled to be paid in full        in May 2012. |

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| - Definition
Description of a short-term or long-term contractual arrangement with a lender, including letter of credit, standby letter of credit, and revolving credit arrangements, under which borrowings can be made up to maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line of credit.
+ References
Reference 1: 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.Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5Reference 3: 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(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682
+ Details**Name:**us-gaap_LineOfCreditFacilityDescription**Namespace Prefix:**us-gaap_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |