XML 45 R34.htm IDEA: XBRL DOCUMENT v3.7.0.1
Note 7 - Fair Value of Financial Instruments (Details Textual) - USD ($)
$ in Millions
Jun. 30, 2017
Dec. 31, 2016
Industrial Revenue Bonds [Member]    
Long-term Debt, Fair Value $ 0.9 $ 1.8