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Note 3 - Fair Value of Financial Instruments
3 Months Ended
Mar. 31, 2013
Fair Value, Option [Text Block]
3.
Fair Value of Financial Instruments - The carrying value of cash, marketable securities, accounts receivable, accounts payable and certain other financial instruments (such as short-term borrowings, accrued expenses, and other current liabilities) included in the accompanying consolidated balance sheets approximates their fair value principally due to the short-term maturity of these instruments.

Financial instruments that potentially subject us to concentrations of credit risk consist principally of cash, marketable securities and trade accounts.  Our available cash is held in accounts managed by third-party financial institutions.  Cash may exceed the Federal Deposit Insurance Corporation, or FDIC, insurance limits. While we monitor cash balances on a regular basis and adjust the balances as appropriate, these balances could be impacted if the underlying financial institutions fail. To date, we have experienced no loss or lack of access to our cash; however, we can provide no assurances that access to our cash will not be impacted by adverse conditions in the financial markets.