Inventories (Tables)

9 Months Ended

12 Months Ended

Sep. 30, 2020

Dec. 31, 2019

Inventory Disclosure [Abstract]

Summary of inventories net of write downs

Inventory, net of write-downs, consisted of the following (in thousands):

	As of
	September 30, 2020		December 31, 2019
Raw materials	$	95	$	1,998
Work-in-process		331		1,376
Finished goods		2,495		628
Total inventory, net of allowance	$	2,921	$	4,002

Inventory, net of write-downs, consists of the following (in thousands):

	As of December 31,
	2019		2018
Raw materials	$	1,998	$	1,800
Work-in-process		1,376		905
Finished goods		628		221
Total inventory	$	4,002	$	2,926