Note 4 - Accrued Expenses and Other Current Liabilities (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

Schedule of Accrued Liabilities [Table Text Block]

	December 31,
	2021		2020
Accrued research and development	$	1,005	$	907
Accrued payroll and bonuses		606		426
Accrued legal, regulatory, professional and other		442		262
Accrued liabilities due to related party		109		78
Operating lease liability - current		96		118
Total accrued expenses and other current liabilities	$	2,258	$	1,791