Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Current assets
Cash and cash equivalents	$ 75,773	$ 75,502
Marketable securities	70,857	82,761
Accounts receivable and unbilled receivable, net	16,595	16,128
Other receivables	4,234	3,449
Inventory	915	912
Prepaid expenses and other current assets	8,351	8,360
Total current assets	176,725	187,112
Property, plant, and equipment, net	238,184	243,118
Operating lease right-of-use asset	4,310	4,468
Intangible assets, net	108	121
Deferred tax assets	1,123	1,261
Other long-term assets	28,193	25,754
Total assets	448,643	461,834
Current liabilities
Accounts payable	2,034	1,858
Accrued expenses	5,361	7,689
Operating lease liabilities, current	323	367
Notes payable, short-term	5,303	1,730
Other liabilities, current	973	918
Derivative liability	26	300
Total current liabilities	14,020	12,862
Earnout liability	265	1,783
Canadian Government Research and Development Program liability	15,286	7,348
Common stock warrants liability	692	1,341
Notes payable, long-term	3,459	3,459
Operating lease liabilities	4,123	4,207
Other liabilities, long-term	2,614	8,327
Total liabilities	40,459	39,327
Commitments and contingencies (See Note 15)
STOCKHOLDERS’ EQUITY
Preferred stock, $0.0001 par value, 10,000,000 shares authorized; no shares issued and outstanding as of March 31, 2024 and December 31, 2023	0	0
Common stock, $0.0001 par value, 1,000,000,000 shares authorized; 146,504,924 and 145,706,531, issued and outstanding as of March 31, 2024 and December 31, 2023, respectively (including 4,500,000 Sponsor Vesting Shares)	15	15
Additional paid-in capital	385,718	382,854
Retained earnings	31,657	45,570
Accumulated other comprehensive loss	(9,206)	(5,932)
Total stockholders’ equity	408,184	422,507
Total liabilities and stockholders’ equity	$ 448,643	$ 461,834