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Debt	12 Months Ended
Debt	Dec. 31, 2014
Debt [Abstract]
Debt	Note 9. Debt We have an unused credit facility with a bank that provides for a line of credit of $10.0 million as of December 31, 2014 and 2013, respectively, which is secured by marketable securities we have with the bank and shown as short-term and long-term investments of $15.1 million on our consolidated balance sheets. The annual interest rate is 1.65% over the current 30-day LIBOR (London Interbank Offered Rate). The annual interest rate was approximately 1.9% as of December 31, 2014. There were no outstanding borrowings under this line of credit as of December 31, 2014 and 2013.

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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