Note 3 - Revenue Recognition (Tables)

9 Months Ended

Sep. 30, 2022

Notes Tables

Disaggregation of Revenue [Table Text Block]

	Three Months Ended September 30,				Nine Months Ended September 30,
	2022		2021		2022		2021
	(in thousands)				(in thousands)
U.S.
Systems	$	-	$	-	$	-	$	-
Instruments and accessories		60		60		142		204
Services		75		105		225		307
Leases		46		78		211		259
Total U.S. revenue		181		243		578		770
Outside of U.S. ("OUS")
Systems		1,227		1,129		1,228		2,050
Instruments and accessories		677		733		1,195		1,397
Services		260		290		842		873
Leases		218		176		780		666
Total OUS revenue		2,382		2,328		4,045		4,986
Total
Systems		1,227		1,129		1,228		2,050
Instruments and accessories		737		793		1,337		1,601
Services		335		395		1,067		1,180
Leases		264		254		991		925
Total revenue	$	2,563	$	2,571	$	4,623	$	5,756

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

	As of
	September 30, 2022		December 31, 2021
	(in thousands)
Contract Assets	$	68	$	91
Deferred Revenue	$	357	$	543