XML 68 R74.htm IDEA: XBRL DOCUMENT v3.20.1
Note 12 - Stock Option and Equity Incentive Plans - Compensation Cost (Details) - Selling, General and Administrative Expenses [Member] - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Share-based compensation expense $ 1,591 $ 1,212 $ 1,068
Common Stock [Member]      
Share-based compensation expense 400 505 505
Employee and Nonemployee Stock Option [Member]      
Share-based compensation expense 151 149 138
Restricted Stock Units (RSUs) [Member]      
Share-based compensation expense $ 1,040 $ 558 $ 425