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Note 6 - Fair Value of Financial Instruments
6 Months Ended
Jun. 30, 2019
Notes to Financial Statements  
Fair Value, Option [Text Block]
6.
FAIR VALUE OF FINANCIAL INSTRUMENTS
 
The carrying value of cash, marketable securities, accounts receivable, notes receivable, accounts payable and certain other financial instruments (such as 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, trade accounts and notes receivable. 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.