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Note 4 - Credit Facilities (Detail) - Credit facilities loan balance (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Mar. 31, 2013
Dec. 31, 2012
Loan Balance $ 1,081 $ 2,393 [1]
Japan Term Loan 149 171
Japan Term Loan 0.10% 0.10%
United States [Member]
   
Loan Balance 713 1,762
Average Interest Rate 3.50% 4.30%
Australia [Member]
   
Loan Balance 44 210
Average Interest Rate 9.10% 9.40%
Canada [Member]
   
Loan Balance $ 324 $ 421
Average Interest Rate 4.00% 4.00%
[1] The Balance Sheet at December 31, 2012, is excerpted from the consolidated audited financial statements as of that date but does not include certain information and footnotes required by accounting principles generally accepted in the United States for complete financial statements.