Other Current Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Other Assets, Current	$ 788	$ 803
Prepaid Expenses [Member]
Other Assets, Current	800	800
Prepaid Insurance		100
Prepaid Expenses [Member] | Acute Myeloid Leukemia [Member]
Other Assets, Current		600
Prepaid Expenses [Member] | AcuteMyeloidLeukemia and Chronic Myelogenous Leukemia Member
Other Assets, Current	600
Prepaid Insurance	$ 200
Other Prepaid Expenses [Member]
Other Assets, Current		$ 100