CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Current assets
Cash	$ 58,514	$ 39,462
Prepaid expenses and other current assets	3,168	3,509
Total current assets	61,682	42,971
Property and equipment, net	16,554	17,290
Restricted cash	307	0
Other assets	3,899	4,286
Total assets	82,442	64,547
Current liabilities
Accounts payable	4,243	3,172
Accrued expenses and other current liabilities	15,500	13,343
Operating lease obligations	519	574
Current portion of long term debt	1,326	0
Total current liabilities	21,588	17,089
Non-current liabilities
Operating lease obligations, less current portion	3,313	3,567
Long term debt, net	27,345	2,800
Other non-current liabilities	564	527
Total non-current liabilities	31,222	6,894
Total liabilities	52,810	23,983
Commitments and contingencies (Note 14)
Stockholders' equity
Series B Convertible Preferred Stock; zero shares issued and outstanding at December 31, 2024 and 54,745 issued and outstanding at December 31, 2023	0	1
Common stock; $0.01 par value; 390,000,000 shares authorized; 291,489,058 and 256,688,304 shares issued, and 291,367,558 and 256,566,804 shares outstanding at December 31, 2024 and 2023, respectively	2,915	2,567
Treasury stock, at cost, 121,500 shares at December 31, 2024 and 2023	(48)	(48)
Additional paid-in capital	366,938	324,191
Accumulated other comprehensive income	48	20
Accumulated deficit	(340,221)	(286,167)
Total stockholders' equity	29,632	40,564
Total liabilities and stockholders' equity	$ 82,442	$ 64,547