Balance Sheet Details

12 Months Ended

Dec. 31, 2021

Balance Sheet Related Disclosures [Abstract]

Balance Sheet Details

Balance Sheet Details

Cash, Cash Equivalents and Restricted Cash

Cash, cash equivalents and restricted cash consisted of the following as of December 31, 2021 and 2020 (in thousands):

	December 31,
	2021		2020
Cash and cash equivalents	$	28,451	$	68,520
Restricted cash	1,016		1,016
Total cash, cash equivalents, and restricted cash	$	29,467	$	69,536

Short-term restricted cash of approximately $16 thousand is included in prepaid expenses and other current assets, and $1.0 million of non-current restricted cash is included in other non-current assets in the consolidated balance sheets as of December 31, 2021 and 2020.

Inventories, net

Inventories, net consisted of the following as of December 31, 2021 and 2020 (in thousands):

	December 31,
	2021		2020
Raw materials	$	9,345	$	8,292
Work-in-process	867		1,214
Finished goods	10,613		10,183
Total inventories, net	$	20,825	$	19,689

Property and Equipment, net

Property and equipment, net consisted of the following as of December 31, 2021 and 2020 (in thousands):

	December 31,
	2021		2020
Computer equipment and software	$	5,759	$	4,240
Laboratory and manufacturing equipment	30,260		18,107
Leasehold improvements	12,095		7,203
Office, furniture and fixtures	2,074		1,994
Property and equipment, gross	50,188		31,544
Less accumulated depreciation and amortization	(26,703)		(23,989)
Construction-in-progress	4,549		9,976
Property and equipment, net	$	28,034	$	17,531

The majority of the amounts included in construction-in-progress are related to the NIH Contract (see Note 4).

Accrued Compensation and Related Benefits

Accrued compensation and related benefits consisted of the following as of December 31, 2021 and 2020 (in thousands):

	Year Ended December 31,
	2021		2020
Accrued incentive compensation	$	40	$	7,842
Accrued vacation	3,388		3,367
Accrued payroll taxes and other	1,492		2,578
Accrued compensation and related benefits	$	4,920	$	13,787

Warranties

Activity for our warranty accrual for the years ended December 31, 2021 and 2020, which is included in other accrued liabilities, is summarized below (in thousands):

	Year Ended December 31,
	2021		2020
Beginning balance	$	1,663	$	1,390
Accrual for current period warranties	418		1,028
Warranty costs incurred	(911)		(755)
Ending balance	$	1,170	$	1,663