XML 62 R53.htm IDEA: XBRL DOCUMENT v3.20.1
Note 3 - Supplemental Cash Flow Information (Details Textual) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Cashless Exercise of Stock Options $ 0 $ 0 $ 172