Note 4 - Other Accrued Liabilities (Tables)

6 Months Ended

Jun. 30, 2022

Notes Tables

Other Liabilities [Table Text Block]

	June 30,		December 31,
	2022		2021
Equipment maintenance and upgrades	$	6,000	$	367,000
Insurance		105,000		340,000
Professional services		194,000		90,000
Operating costs		552,000		397,000
Other		283,000		311,000
Total other accrued liabilities	$	1,140,000	$	1,505,000