Note 8 - Accrued Expenses and Other Current Liabilities (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

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

	December 31,
	2019		2018
Accrued expenses	$	10	$	127
Accrued salaries and employee benefits		652		368
Accrued director compensation		648		277
Accrued clinical trial costs		519		276
Grant liability		630		645
Customer deposits		102		112
Total	$	2,561	$	1,805