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v3.19.3.a.u2

Note 1 - Summary of Significant Accounting Policies (Details Textual) - USD ($) |  | 12 Months Ended | 48 Months Ended
--- | --- | --- | ---
Mar. 06, 2019 | Dec. 31, 2019 | Dec. 31, 2018 | Mar. 09, 2014
Impairment of Deferred Development Costs |  | $ 0 | $ 0 |
Asset Impairment Charges, Total |  | 3,643,000 | $ 0 |
Operating Lease, Expense |  | 69,000 |  |
Lessee, Operating Lease, Liability, Payments, Due, Total |  | $ 43,000 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period | 25,000 |  |  |
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price | $ 5.20 |  |  |
Vested Annually [Member] | Share-based Payment Arrangement, Option [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage |  |  |  | 20.00%
Minimum [Member] |  |  |  |
Property, Plant and Equipment, Useful Life |  |  | 3 years |
Maximum [Member] |  |  |  |
Property, Plant and Equipment, Useful Life |  |  | 40 years |

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- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2420-110228 + Details
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