Other Current Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Other Assets, Current	$ 739	$ 803
Prepaid Insurance	300	100
Acute Myeloid Leukemia [Member]
Other Assets, Current	400	600
Prepaid Expenses [Member]
Other Assets, Current	$ 700	800
Other Prepaid Expenses [Member]
Other Assets, Current		$ 100