Quarterly report pursuant to Section 13 or 15(d)

Note 5 - Stock-based Compensation (Details Textual)

v3.19.1
Note 5 - Stock-based Compensation (Details Textual) - USD ($)
3 Months Ended
Mar. 31, 2019
Mar. 31, 2019
Mar. 31, 2018
Share-based Payment Arrangement, Expense   $ 62,000 $ 138,000
Share-based Payment Arrangement, Expense, Tax Benefit   0 $ 0
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total $ 166,000 $ 166,000  
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition 1 year 36 days