Note 4 - Other Accrued Liabilities (Tables)

9 Months Ended

Sep. 30, 2022

Notes Tables

Other Liabilities [Table Text Block]

	September 30,		December 31,
	2022		2021
Equipment maintenance and upgrades	$	—	$	367,000
Insurance		-		340,000
Professional services		116,000		90,000
Operating costs		702,000		397,000
Other		304,000		311,000
Total other accrued liabilities	$	1,122,000	$	1,505,000