Note 9 - Fair Value (Details Textual) Pure in Thousands, $ in Thousands  | 
6 Months Ended | 
|---|---|
| 
 Jun. 30, 2023  
USD ($) 
 | |
| Number of Instruments Categorized as Level Three | 0 | 
| Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings | $ 0 | 
| X | ||||||||||
- Definition The number of instruments categorized as level 3. No definition available. 
  | 
| X | ||||||||||
- Definition Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3). Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
  |