Other Current Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Other Assets, Current	$ 1,434	$ 788
Prepaid Expenses [Member]
Other Assets, Current	1,400	800
Prepaid Insurance		200
Prepaid Expenses [Member] | AML, BP1002 in lymphoma and prexigebersen-A
Other Assets, Current	600
Prepaid Insurance	500
Prepaid Expenses [Member] | BP1003 Manufacturing Activities [Member]
Prepaid Insurance	200
Prepaid Expenses [Member] | AcuteMyeloidLeukemia and Chronic Myelogenous Leukemia Member
Other Assets, Current		$ 600
Other Prepaid Expenses [Member]
Other Assets, Current	$ 100