CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Current assets:
Cash and cash equivalents	$ 3,398	$ 1,572
Accounts receivable	0	879
Insurance receivable	408	408
Prepaids and other current assets	3,031	1,667
Total current assets	6,837	4,526
Property, machinery and equipment, net	1,871	2,182
Intangible assets, net	240	253
Operating right-of-use asset	288	347
Other non-current assets	2,491	2,644
Total assets	11,727	9,952
Current liabilities:
Accounts payable	6,312	5,596
Accrued liabilities	2,887	3,006
Loan payable, current	3,759	4,957
Contract liabilities, current	2,765	345
Operating lease liability, current	827	685
Litigation settlement contingency	420	420
Other current liabilities	3	1
Total current liabilities	16,973	15,010
Contract liabilities, non-current	239	1,901
Warrant liability	3	3
Operating lease liability, non-current	0	333
Other non-current liabilities	484	515
Total non-current liabilities	726	2,752
Total liabilities	17,699	17,762
Commitments and Contingencies (Note 12)
Stockholders’ deficit:
Preferred stock, $0.00001 par value; 20,000,000 shares authorized and 0 issued and outstanding as of March 31, 2025 and December 31, 2024, respectively	0	0
Additional paid-in capital	408,193	400,183
Accumulated deficit	(414,165)	(407,993)
Total stockholders’ deficit	(5,972)	(7,810)
Total liabilities and stockholders’ equity deficit	11,727	9,952
Common Class A
Stockholders’ deficit:
Common stock, value	0	0
Common Class B
Stockholders’ deficit:
Common stock, value	$ 0	$ 0