Note 2 - Revenue and Product Costs (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]

	Customer			Deferred
	Deposits			Revenue
Balance at January 1, 2022	$	43		$	265
Additions, net		-			301
Transfer to revenue		(43	)		(233	)
Balance at December 31, 2022	$	-		$	333
Current portion	$	-		$	166
Long-term portion	$	-		$	167