Accrued Expenses (Tables)

6 Months Ended

Jun. 30, 2023

Accrued Liabilities, Current [Abstract]

Schedule of Accrued Liabilities [Table Text Block]

Accrued expenses consisted of the following (in thousands):

	June 30,		December 31,
	2023		2022
Accrued compensation and other employee benefits	$	3,140	$	3,580
Accrued research and development expenses		287		360
Accrued professional services		365		204
Accrued other expenses		355		439
Total accrued expenses	$	4,147	$	4,583