XML 66 R55.htm IDEA: XBRL DOCUMENT v3.21.2
Note 7 - Leases (Details Textual) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Leases [Abstract]        
Income recognized for sales-type lease arrangements $ 1 $ 0 $ 2 $ 0