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Note 3 - Fair Value Measurements
6 Months Ended
Jun. 30, 2020
Notes to Financial Statements  
Fair Value Disclosures [Text Block]
3.
Fair Value Measurements
 
The Company has financial instruments, such as accounts receivable, accounts payable, and accrued expenses, which are stated at carrying amounts that approximate fair value because of the short maturity of those instruments. The carrying amount of the Company's long-term debt approximates fair value as the interest rate on the debt approximates the estimated borrowing rate currently available to the Company.