Note 14 - Income Taxes - Unrecognized Tax Benefit Roll Forward (Details) - USD ($) |
12 Months Ended | |
|---|---|---|
Dec. 31, 2020 |
Dec. 31, 2019 |
|
| Balance | $ 223,000 | $ 450,000 |
| Additions (deletions) based upon tax positions related to the current year | 22,000 | (227,000) |
| Balance | $ 245,000 | $ 223,000 |
| X | ||||||||||
- Definition Amount of unrecognized tax benefits. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of increase (decrease) in unrecognized tax benefits attributable to uncertain tax positions taken in tax returns. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|