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Note 4 - Credit Facilities (Details) - Credit Facilities Loan Balance (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Note 4 - Credit Facilities (Details) - Credit Facilities Loan Balance [Line Items]    
$ 6,438,000us-gaap_LongTermDebt $ 4,311,000us-gaap_LongTermDebt
UNITED STATES    
Note 4 - Credit Facilities (Details) - Credit Facilities Loan Balance [Line Items]    
Loan Balance 5,804,000us-gaap_LineOfCredit
/ us-gaap_StatementGeographicalAxis
= country_US
3,615,000us-gaap_LineOfCredit
/ us-gaap_StatementGeographicalAxis
= country_US
Interest Rate 2.80%us-gaap_LineOfCreditFacilityInterestRateDuringPeriod
/ us-gaap_StatementGeographicalAxis
= country_US
[1] 2.80%us-gaap_LineOfCreditFacilityInterestRateDuringPeriod
/ us-gaap_StatementGeographicalAxis
= country_US
[2]
AUSTRALIA    
Note 4 - Credit Facilities (Details) - Credit Facilities Loan Balance [Line Items]    
Loan Balance 406,000us-gaap_LineOfCredit
/ us-gaap_StatementGeographicalAxis
= country_AU
696,000us-gaap_LineOfCredit
/ us-gaap_StatementGeographicalAxis
= country_AU
Interest Rate 7.10%us-gaap_LineOfCreditFacilityInterestRateDuringPeriod
/ us-gaap_StatementGeographicalAxis
= country_AU
[1] 7.00%us-gaap_LineOfCreditFacilityInterestRateDuringPeriod
/ us-gaap_StatementGeographicalAxis
= country_AU
[2]
CHINA    
Note 4 - Credit Facilities (Details) - Credit Facilities Loan Balance [Line Items]    
China 228,000us-gaap_LoansPayable
/ us-gaap_StatementGeographicalAxis
= country_CN
 
China 7.20%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_StatementGeographicalAxis
= country_CN
 
JAPAN    
Note 4 - Credit Facilities (Details) - Credit Facilities Loan Balance [Line Items]    
Japan Term Loan $ 75,000us-gaap_SecuredLongTermDebt
/ us-gaap_StatementGeographicalAxis
= country_JP
$ 113,000us-gaap_SecuredLongTermDebt
/ us-gaap_StatementGeographicalAxis
= country_JP
Japan Term Loan 0.10%us-gaap_DebtInstrumentInterestRateDuringPeriod
/ us-gaap_StatementGeographicalAxis
= country_JP
[1] 0.10%us-gaap_DebtInstrumentInterestRateDuringPeriod
/ us-gaap_StatementGeographicalAxis
= country_JP
[2]
[1] Based on interest rate at December 31, 2014
[2] Based on interest rate at December 31, 2013