Note 7 - Accrued Expenses and Other Current Liabilities (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

Schedule of Accrued Liabilities and Other Current Liabilities [Table Text Block]

	December 31,		December 31,
	2021		2020
Accrued expenses	$	240	$	87
Accrued salaries and employee benefits		861		961
Accrued clinical trial costs		334		452
Grant liability		590		615
Customer deposits		96		90
Total	$	2,121	$	2,205