Condensed Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 36,388	$ 73,222
Short-term investments	186,403	214,280
Accounts receivable, net	36,902	28,070
Inventories	44,495	51,476
Prepaid expenses and other current assets	5,216	6,597
Total current assets	309,404	373,645
Restricted cash	3,329	3,311
Property and equipment, net	14,539	15,876
Operating lease right-of-use assets	6,042	6,117
Other assets	1,128	1,166
Total assets	334,442	400,115
Current liabilities:
Accounts payable	2,217	603
Accrued compensation and related benefits	17,461	21,519
Accrued expenses and other current liabilities	12,650	16,227
Accrued warranty liability	4,168	3,620
Deferred revenue, current	10,854	8,662
Operating lease liabilities, current	1,474	1,318
Total current liabilities	48,824	51,949
Accrued interest	484	113
Deferred revenue	89	151
Operating lease liabilities	5,308	5,576
Term loan	96,629	96,336
Total liabilities	151,334	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 June 30, 2023 and December 31, 2022	0	0
Common stock, $0.001 par value; 300,000 shares authorized as of June 30, 2023 and December 31, 2022; 49,629 and 48,465 shares issued and outstanding as of June 30, 2023 and December 31, 2022, respectively	50	48
Additional paid-in capital	1,060,418	1,035,456
Accumulated other comprehensive loss	(393)	(564)
Accumulated deficit	(876,967)	(788,950)
Total stockholders' equity	183,108	245,990
Total liabilities and stockholders' equity	$ 334,442	$ 400,115