Condensed consolidated balance sheets - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Current assets:
Cash and cash equivalents	$ 18,333	$ 16,911
Short-term investments	12,922	33,821
Accounts receivable	6,048	7,519
Inventory	20,560	20,200
Prepaid expenses and other current assets	2,283	2,466
Total current assets	60,146	80,917
Property and equipment, net	10,205	11,193
Right-of-use assets, net	4,640	5,163
Other long-term assets	311	531
Restricted cash	284	365
Total assets	75,586	98,169
Current liabilities:
Accounts payable	3,334	2,535
Accrued expenses and other current liabilities	5,678	7,217
Deferred revenue	6,136	6,599
Lease liabilities, short-term	1,255	1,214
Total current liabilities	16,403	17,565
Lease liabilities, long-term	4,324	4,954
Other long-term liabilities	314	298
Total liabilities	21,041	22,817
Commitments and contingencies (Note 14)
Stockholders’ equity:
Preferred stock, $0.01 par value: 10,000,000 shares authorized at June 30, 2025 and December 31, 2024; zero shares issued and outstanding at June 30, 2025 and December 31, 2024	0	0
Additional paid-in capital	552,502	550,157
Accumulated deficit	(498,395)	(475,274)
Accumulated other comprehensive income	(2)	39
Total stockholders’ equity	54,545	75,352
Total liabilities and stockholders’ equity	75,586	98,169
Class A Common stock
Stockholders’ equity:
Common stock	395	377
Class B Common stock
Stockholders’ equity:
Common stock	$ 45	$ 53