Note 11 - Subsequent Events (Details Textual) - Subsequent Event [Member] - Warrants Issued as Partial Payment of Retainer Fee in Connection with Investment Banking Firm Agreement [Member]	Feb. 21, 2020 USD ($) shares
Class of Warrant or Right, Issued During Period \| shares	75,000
Warrants and Rights Outstanding, Term	5 years
Warrants and Rights Outstanding \| $	$ 148,000

Period between issuance and expiration of outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

Name:	us-gaap_WarrantsAndRightsOutstandingTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant