Inventory (Tables)

12 Months Ended

Dec. 31, 2021

Inventory Disclosure [Abstract]

Summary of the Components of Inventory

The components of inventories are as follows (in thousands):

	As of December 31,
	2021			2020
Raw materials	$	592		$	427
Work in process		507			481
Finished goods		983			991
		2,082			1,899
Less: allowance for inventory excess and obsolescence		(526	)		(611	)
Total current and non-current inventory, net	$	1,556		$	1,288
Inventory, net	$	1,184		$	917
Non-current inventory		372			371
Total current and non-current inventory, net	$	1,556		$	1,288