CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current assets
Cash and cash equivalents	$ 99,495	$ 209,841
Prepaid expenses	11,400	13,819
Cryptocurrencies	191	0
Total current assets	111,086	223,660
Deposits on equipment	207,164	114,857
Property and equipment, net	15,178	5,124
Security deposits	11,362	10,352
Investment in equity investee	7,373
Right-of-use asset	5,718
Deferred investment cost		174
Total assets	357,881	354,167
Current liabilities
Accounts payable	1,991	242
Accounts payable, related party	3,863
Operating lease liability, current portion	557
Accrued expenses	3,611	257
Total current liabilities	10,022	499
Operating lease liability, net of current portion	5,276
Warrant liability	89	137
Total liabilities	15,387	636
Commitments and contingencies (Note 11)
Stockholders' equity
Preferred stock, $0.001 par value; 10,000,000 shares authorized, none issued and outstanding as of March 31, 2022 and December 31, 2021
Common stock, $0.001 par value, 500,000,000 shares authorized, 253,685,763 and 252,131,679 shares issued as of March 31, 2022 and December 31, 2021, respectively, and 250,174,273 and 249,279,420 shares outstanding as of March 31, 2022 and December 31, 2021, respectively	254	252
Additional paid-in capital	431,899	425,438
Treasury stock, at par, 3,511,490 and 2,852,259 shares at March 31, 2022 and December 31, 2021, respectively	(4)	(3)
Accumulated deficit	(89,655)	(72,156)
Total stockholders' equity	342,494	353,531
Total liabilities and stockholders' equity	$ 357,881	$ 354,167