Note 4 - Balance Sheet Details (Tables)

9 Months Ended

Sep. 30, 2021

Notes Tables

Schedule of Accrued Liabilities [Table Text Block]

Accrued liabilities consisted of the following (in thousands):

	September 30, 2021		December 31, 2020
Accrued accounts payable	$	346	$	1,018
Accrued clinical trial costs		247		875
Accrued director stipends		102		759
Accrued other		27		88
	$	722	$	2,740

Summary of Prepaid Expenses and Other Current Assets [Table Text Block]

Prepaid expenses and other current assets consisted of the following (in thousands):

	September 30, 2021		December 31, 2020
Prepaid insurances	$	1,696	$	31
Other receivables		116		—
Prepaid subscriptions and fees		97		35
Prepaid software licenses		36		0
Deposits		26		16
Deferred financing costs		—		41
Prepaid other		17		1
	$	1,988	$	124