XML 28 R18.htm IDEA: XBRL DOCUMENT v3.8.0.1
Note 12 - Fair Value of Financial Instruments
3 Months Ended
Mar. 31, 2018
Notes to Financial Statements  
Fair Value Disclosures [Text Block]
(
12
) Fair Value of Financial Instruments
 
The carrying amounts of cash equivalents, accounts receivable and accounts payable approximate fair value because of the short maturity of these instruments.