Note 4 - Credit Facilities (Details) - Summary of Credit and Other Debt Facilities (USD $)	3 Months Ended	12 Months Ended
Mar. 31, 2015	Dec. 31, 2014
Note 4 - Credit Facilities (Details) - Summary of Credit and Other Debt Facilities [Line Items]
	$ 6,009,000us-gaap_LongTermDebt	$ 6,438,000us-gaap_LongTermDebt
Unused availability	2,071,000	2,269,000
UNITED STATES
Note 4 - Credit Facilities (Details) - Summary of Credit and Other Debt Facilities [Line Items]
Loan balance	5,354,000	5,804,000
Interest rate	2.80%	2.80%
Unused availability	1,574,000	1,696,000
AUSTRALIA
Note 4 - Credit Facilities (Details) - Summary of Credit and Other Debt Facilities [Line Items]
Loan balance	426,000	406,000
Interest rate	6.70%	7.10%
Unused availability	497,000	573,000
CHINA
Note 4 - Credit Facilities (Details) - Summary of Credit and Other Debt Facilities [Line Items]
China	229,000	228,000
China	7.20%	7.20%
JAPAN
Note 4 - Credit Facilities (Details) - Summary of Credit and Other Debt Facilities [Line Items]
Japan Term Loan	$ 70,000	$ 75,000
Japan Term Loan	0.10%	0.10%

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The average effective interest rate during the reporting period.

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-Publisher FASB

-Name Accounting Standards Codification

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Contractual interest rate for funds borrowed, under the debt agreement.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a 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. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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The effective interest rate during the reporting period.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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Including the current and noncurrent portions, aggregate carrying value as of the balance sheet date of loans payable (with maturities initially due after one year or beyond the operating cycle if longer).

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Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Carrying amount of collateralized debt obligations with maturities initially due after one year or beyond the operating cycle, if longer, excluding the current portion. Obligations include, but not limited to, mortgage loans, chattel loans, and other borrowings secured by assets.

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