Note 1 - Basis of Presentation (Tables)

3 Months Ended

Mar. 31, 2022

Notes Tables

Reconciliation of Revenue from Segments to Consolidated [Table Text Block]

	March 31, 2022			March 31, 2021
Revenues
Domestic	$	4,141,000		$	3,699,000
Foreign		706,000			665,000
Total	$	4,847,000		$	4,364,000
Profit or (loss)
Domestic	$	276,000		$	73,000
Foreign		(7,000	)		(44,000	)
Total	$	269,000		$	29,000