XML 54 R43.htm IDEA: XBRL DOCUMENT v3.20.2
Note 8 - Share-based Compensation - Key Assumptions (Details) - $ / shares
Mar. 01, 2020
Dec. 20, 2019
Feb. 01, 2019
Fair value lower range (in dollars per share) $ 1.46 $ 1.58 $ 2.81
Fair value higher range (in dollars per share) 1.49 1.61 2.86
Exercise price (in dollars per share) $ 2.33 $ 2.56 $ 4.72
Expected volatility 70.00% 70.00% 65.00%
Dividend yield 0.00% 0.00% 0.00%
Risk-free rate 1.05% 1.85% 2.61%
Minimum [Member]      
Expected term (Year) 1 year 1 year 1 year
Maximum [Member]      
Expected term (Year) 1 year 6 months 1 year 7 months 6 days 1 year 3 months 18 days