Condensed Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 9,086	$ 28,400
Short-term investments	1,290	1,280
Accounts receivable, net	1,016	1,261
Inventories, net	2,376	2,219
Prepaid expenses and other current assets	657	1,511
Total current assets	14,425	34,671
Property and equipment, net	52	91
Operating lease right-of-use assets	3,142	3,980
Goodwill	6,169	6,169
Long-term restricted investments	150	150
Other long-term assets	128	128
Total assets	24,066	45,189
Current liabilities:
Accounts payable	498	1,777
Accrued liabilities	4,798	5,966
Term loan, current portion, net	10,466	16,663
Operating lease liabilities, current portion	1,308	1,381
Warrant liabilities	3,137	1,224
Total current liabilities	20,207	27,011
Operating lease liabilities, non-current portion	1,966	2,702
Other long-term liabilities	676	693
Commitments and contingencies
Stockholders’ equity:
Common stock	23	23
Additional paid-in capital	605,828	603,780
Accumulated other comprehensive loss		(14)
Accumulated deficit	(604,634)	(589,006)
Stockholders’ equity	1,217	14,783
Total liabilities and stockholders’ equity	$ 24,066	$ 45,189