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Note 7 - Short-term Borrowings	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Debt Disclosure [Text Block]	7. SHORT-TERM BORROWINGS We established a working capital credit facility with a bank in October 2003 and in the past, renewed the line periodically, with a maximum principal availability of $1.25 million based on qualified receivables. Since we have not borrowed under the bank line of credit in the past five years and did not expect to need to do so in the foreseeable future, when the line of credit expired on June 30, 2016, we did not renew the bank line for an additional period.

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- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-URI http://asc.fasb.org/topic&trid=2208564

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- References

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