Condensed Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 87,637	$ 110,231
Short-term investments	21,234
Accounts receivable, net	15,779	11,832
Inventories	17,616	17,851
Prepaid expenses and other current assets	4,653	3,412
Total current assets	146,919	143,326
Property and equipment, net	9,755	7,697
Restricted cash	232	232
Other non-current assets	5,815	5,370
Total assets	162,721	156,625
Current liabilities:
Accounts payable	3,666	2,379
Accrued liabilities	17,575	19,802
Short-term debt		3,905
Total current liabilities	21,241	26,086
Long-term debt	74,033	44,786
Other liabilities	7,418	6,513
Total liabilities	102,692	77,385
Commitments and contingencies (Note 7)
Stockholders’ equity):
Preferred stock, $0.001 par value Shares authorized: 5,000,000 at June 30, 2022 and December 31, 2021 Shares issued and outstanding: none at June 30, 2022 and December 31, 2021
Common stock, $0.001 par value Shares authorized: 100,000,000 at June 30, 2022 and December 31, 2021 Shares issued and outstanding: 35,193,169 and 34,980,896 at June 30, 2022 and December 31, 2021, respectively	35	35
Additional paid-in capital	380,775	367,907
Accumulated other comprehensive income (loss)	(2)
Accumulated deficit	(320,779)	(288,702)
Total stockholders’ equity	60,029	79,240
Total liabilities and stockholders’ equity	$ 162,721	$ 156,625