Note 2 - Fair Value Measurements (Details Textual) $ in Millions	Sep. 30, 2023 USD ($)
Fair Value, Inputs, Level 1 [Member] \| Notes Payable, Other Payables [Member] \| Two Thousand and Twenty Six Notes [Member]
Notes Payable, Fair Value Disclosure	$ 36.8

Fair value portion of notes payable.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19,20,22)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

Name:	us-gaap_NotesPayableFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant