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Credit Arrangement	6 Months Ended
	Jun. 30, 2018
Credit Arrangement [Abstract]
Credit Arrangement	NOTE F – Credit Arrangement We have a $60.0 million revolving credit facility secured by our inventory, accounts receivable, cash, and certain other personal property.  Availability fluctuates based on a borrowing base calculation reduced by outstanding letters of credit.  Amounts available to borrow are based on the lesser of the borrowing base or the $60.0 million line amount, reduced by $6.0 million if a fixed charge coverage ratio test for the immediately preceding 12 months are not met. The credit facility contains covenants that, among other things, limit our ability to incur certain types of debt or liens, pay dividends, enter into mergers and consolidations or use proceeds of borrowing for other than permitted uses. The borrowing base was $54.4 million at June 30, 2018, there were no outstanding letters of credit, and the net availability was $48.4 million. We have not had any borrowings under the facility, which matures March 31, 2021, since its origination in 2008.

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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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-URI http://asc.fasb.org/topic&trid=2208564

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