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Note 9 - Customer Deposits	3 Months Ended
Note 9 - Customer Deposits	Mar. 31, 2013
Other Liabilities Disclosure [Text Block]	9. Customer Deposits Customer deposits at March 31, 2013, were $715,000 ($507,000 from domestic operations and $208,000 from international operations) compared to $263,000 at December 31, 2012 ($176,000 from domestic operations and $87,000 from international operations).