CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Current Assets:
Cash and cash equivalents	$ 10,204	$ 3,280
Restricted cash, current		5,000
Grants and accounts receivable, net of allowances of $140 and $158 as of June 30, 2025 and December 31, 2024, respectively	7,743	7,320
Inventories	3,710	2,733
Prepaid expenses and other current assets	1,330	3,271
Total current assets	22,987	21,604
Property and equipment - net	8,466	9,002
Restricted cash	1,522	1,484
Right-of-use asset	11,223	11,511
Other assets	3,792	3,771
Total assets	47,990	47,372
Current Liabilities:
Accounts payable	3,394	3,340
Accrued expenses and other current liabilities	5,953	6,032
Lease liability - current portion	495	453
Total current liabilities	9,842	9,825
Lease liability, net of current portion	12,185	12,444
Long-term debt	14,377	13,996
Total liabilities	36,404	36,265
Commitments and Contingencies
Stockholders' equity
Preferred Stock, par value $0.001, 5,000,000 shares authorized; no shares issued and outstanding as of June 30, 2025 and December 31, 2024
Common Stock, par value $0.001, 100,000,000 shares authorized as of June 30, 2025 and December 31, 2024; 62,610,376 and 54,830,146 shares issued and outstanding as of June 30, 2025 and December 31, 2024, respectively	63	55
Additional paid-in capital	319,023	310,809
Accumulated other comprehensive income (loss)	(3,960)	4,252
Accumulated deficit	(303,540)	(304,009)
Total stockholders' equity	11,586	11,107
Total liabilities and stockholders' equity	$ 47,990	$ 47,372