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Debt Disclosure	9 Months Ended
Debt Disclosure	Sep. 30, 2012
Debt Disclosure [Abstract]
Debt Disclosure	4. In February 2012, the Company entered into a new secured credit agreement with its current lender, BOKF, NA dba Bank of Oklahoma which consists of an approximately $9.0 million term loan maturing December 31, 2014 and a line of credit which permits revolving borrowings and letters of credit up to an aggregate of $15.0 million maturing December 31, 2012. In the credit agreement, the Company pledged its investment account held at BOKF, NA, receivable accounts and inventory as collateral for the term loan and revolving line of credit. During the third quarter of 2012, the Company sold some of the equity securities in its pledged investment account and the proceeds which were still in the settlement process at the end of September 2012 are shown as restricted cash since the withdrawal of the proceeds of the sale of any equity securities from the pledged investment account must be used to reduce the obligations of the Company to the lender per the terms of the secured credit agreement.

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.

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