Accrued Expenses (Tables)

12 Months Ended

Dec. 31, 2023

Accrued Liabilities, Current [Abstract]

Schedule of Accrued Liabilities [Table Text Block]

Accrued expenses consisted of the following (in thousands):

	December 31,
	2023		2022
Accrued compensation and other employee benefits	$	5,229	$	3,580
Accrued research and development expenses		264		360
Accrued professional services		178		204
Accrued other expenses		408		439
Total accrued expenses	$	6,079	$	4,583