Condensed Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 28,400	$ 55,358
Short-term investments	159,961	158,316
Accounts receivable, net	21,525	18,007
Inventories	19,067	19,293
Prepaid expenses and other current assets	4,543	3,924
Total current assets	233,496	254,898
Long-term investments	13,884
Property and equipment, net	8,644	9,372
Restricted cash	0	155
Other non-current assets	7,336	5,260
Total assets	263,360	269,685
Current liabilities:
Accounts payable	5,338	2,523
Accrued liabilities	18,759	21,965
Total current liabilities	24,097	24,488
Long-term debt	75,104	74,596
Other liabilities	8,654	6,726
Total liabilities	107,855	105,810
Commitments and contingencies (Note 7)
Stockholders' equity:
Preferred stock, $0.001 par value Shares authorized: 5,000,000 at June 30, 2023 and December 31, 2022 Shares issued and outstanding: none at June 30, 2023 and December 31, 2022
Common stock, $0.001 par value Shares authorized: 100,000,000 at June 30, 2023 and December 31, 2022 Shares issued and outstanding: 38,812,280 and 38,355,972 at June 30, 2023 and December 31, 2022, respectively	39	38
Additional paid-in capital	529,453	507,715
Accumulated other comprehensive loss	(331)	(166)
Accumulated deficit	(373,656)	(343,712)
Total stockholders’ equity	155,505	163,875
Total liabilities and stockholders’ equity	$ 263,360	$ 269,685