Note 8 - Stock-based Compensation (Details Textual) - shares			9 Months Ended	10 Months Ended
Jun. 11, 2018	Aug. 23, 2017	Sep. 30, 2019	Jun. 11, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	10,000	60,000
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period			5 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares				70,000

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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