Note 6 - Accrued Liabilities (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

Schedule of Accrued Liabilities [Table Text Block]

	December 31,
	2021		2020
Accrued bonuses	$	1,209	$	744
Accrued payroll and other related expenses		495		473
Deferred revenue - subscription rental program		448		345
Accrued clinical trial costs		337		91
Current operating lease liabilities		225		132
Accrued professional fees		120		290
Other accruals		219		341
Total accrued liabilities	$	3,053	$	2,416