Note 3 - Revenue Recognition (Tables)

3 Months Ended

Mar. 31, 2024

Notes Tables

Disaggregation of Revenue [Table Text Block]

	Three Months Ended March 31,
	2024		2023
	(in thousands)
U.S.
Instruments and accessories	$	51	$	60
Services		87		75
Leases		68		71
Total U.S. revenue		206		206
Outside of U.S. ("OUS")
Instruments and accessories		262		233
Services		198		120
Leases		457		417
Total OUS revenue		917		770
Total
Instruments and accessories		313		293
Services		285		195
Leases		525		488
Total revenue	$	1,123	$	976

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

	March 31, 2024		December 31, 2023
	(in thousands)
Contract assets	$	74	$	95
Deferred revenue	$	769	$	711