Summary of Significant Accounting Policies (Tables)

3 Months Ended

6 Months Ended

Jun. 30, 2020

Jun. 30, 2020

Summary of Significant Accounting Policies [Abstract]

Inventory, Major Classes, Policy [Policy Text Block]

	As of June 30,		As of December 31,
	2020		2019
	(in thousands)
Raw materials	$	1,154	$	3,182
Work-in-process	$	2,185	$	153
Finished goods	650		908
Total inventory	$	3,989	$	4,243

Schedule of Accrued Liabilities

Accrued liabilities: Accrued liabilities consisted of the following:

	As of June 30,		As of December 31,
	2020		2019
	(in thousands)
Accrued research and development services	$	47,721	$	29,033
Accrued compensation and benefits	6,697		9,644
Short term lease liability	553		553
Other	2,367		2,921
Accrued liabilities	$	57,338	$	42,151