Other Current Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Other prepaid expenses		$ 3,600
Other current assets	$ 1,664	1,644
Other Current Assets [Member]
Other prepaid expenses	1,700	1,600
Other Current Assets [Member] | BP1002 in lymphoma, prexigebersen in AML and prexigebersen-A [Member]
Prepayments for clinical trials	1,400	1,300
Prepaid insurance	200	$ 300
Prepayments for preclinical studies	$ 100