Note 5 - Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

Fair Value, by Balance Sheet Grouping [Table Text Block]

	Fair Value Measurements as of December 31, 2022
	Quoted Prices in Active Markets using Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Assets
Guaranteed Investment Certificates	$	—	$	59	$	—	$	59
Total assets	$	—	$	59	$	—	$	59

	Fair Value Measurements as of December 31, 2021
	Quoted Prices in Active Markets using Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Assets
Guaranteed Investment Certificates	$	—	$	64	$	—	$	64
Total assets	$	—	$	64	$	—	$	64