XML 61 R48.htm IDEA: XBRL DOCUMENT v3.8.0.1
Note 7 - Share-based Compensation (Details Textual) - USD ($)
9 Months Ended 12 Months Ended
Sep. 30, 2017
Dec. 31, 2017
Dec. 31, 2016
Allocated Share-based Compensation Expense   $ 1,319,000 $ 984,000
Restricted Stock [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 3 years    
Allocated Share-based Compensation Expense   $ 448,000 $ 315,000