Condensed Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 36,386	$ 73,222
Short-term investments	212,827	214,280
Accounts receivable, net	34,314	28,070
Inventories	47,733	51,476
Prepaid expenses and other current assets	6,015	6,597
Total current assets	337,275	373,645
Restricted cash	3,311	3,311
Property and equipment, net	15,189	15,876
Operating lease right-of-use assets	5,823	6,117
Other assets	1,067	1,166
Total assets	362,665	400,115
Current liabilities:
Accounts payable	1,988	603
Accrued compensation and related benefits	14,419	21,519
Accrued expenses and other current liabilities	13,893	16,227
Accrued warranty liability	3,569	3,620
Deferred revenue, current	9,038	8,662
Operating lease liabilities, current	1,361	1,318
Total current liabilities	44,268	51,949
Accrued interest	295	113
Deferred revenue	116	151
Operating lease liabilities	5,220	5,576
Term loan	96,480	96,336
Total liabilities	146,379	154,125
Commitments and contingencies (Note 6)
Stockholders' equity:
Preferred stock, $0.001 par value; 5,000 shares authorized, and no shares issued and outstanding as of March 31, 2023 and December 31, 2022	0	0
Common stock, $0.001 par value; 300,000 shares authorized as of March 31, 2023 and December 31, 2022; 49,216 and 48,465 shares issued and outstanding as of March 31, 2023 and December 31, 2022, respectively	49	48
Additional paid-in capital	1,049,271	1,035,456
Accumulated other comprehensive loss	(113)	(564)
Accumulated deficit	(832,921)	(788,950)
Total stockholders' equity	216,286	245,990
Total liabilities and stockholders' equity	$ 362,665	$ 400,115