Note 3 - Revenue Recognition (Tables)

12 Months Ended

Dec. 31, 2023

Notes Tables

Disaggregation of Revenue [Table Text Block]

	Years Ended December 31,
	2023		2022
	(in thousands)
U.S.
Instruments and accessories	$	205	$	211
Services		294		300
Leases		196		256
Total U.S. revenue		695		767
Outside of U.S. ("OUS")
Systems		3,645		2,551
Instruments and accessories		1,669		1,565
Services		758		1,073
Leases		1,810		1,131
Total OUS revenue		7,882		6,320
Total
Systems		3,645		2,551
Instruments and accessories		1,874		1,776
Services		1,052		1,373
Leases		2,006		1,387
Total revenue	$	8,577	$	7,087

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

	December 31, 2023		December 31, 2022
	(in thousands)
Contract assets	$	95	$	116
Deferred revenue	$	711	$	465