Fair Value Measurements - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Assets:
U.S. Treasury debt securities	$ 18,012	$ 17,398
Safeguarding asset for crypto	1,233,238	701,556
Liabilities:
Safeguarding obligation for crypto	1,233,238	701,556
Warrant liability	21,006	2,356
U.S. treasury bonds
Assets:
U.S. Treasury debt securities	18,012	17,398
Fair Value, Recurring
Assets:
Safeguarding asset for crypto	1,233,238	701,556
Total assets	1,251,250	718,954
Liabilities:
Safeguarding obligation for crypto	1,233,238	701,556
Total liabilities	1,254,244	703,912
Fair Value, Recurring | U.S. treasury bonds
Assets:
U.S. Treasury debt securities	18,012	17,398
Fair Value, Recurring | Level 1
Assets:
Safeguarding asset for crypto	0	0
Total assets	18,012	17,398
Liabilities:
Safeguarding obligation for crypto	0	0
Total liabilities	928	2,356
Fair Value, Recurring | Level 1 | U.S. treasury bonds
Assets:
U.S. Treasury debt securities	18,012	17,398
Fair Value, Recurring | Level 2
Assets:
Safeguarding asset for crypto	1,233,238	701,556
Total assets	1,233,238	701,556
Liabilities:
Safeguarding obligation for crypto	1,233,238	701,556
Total liabilities	1,233,238	701,556
Fair Value, Recurring | Level 2 | U.S. treasury bonds
Assets:
U.S. Treasury debt securities	0	0
Fair Value, Recurring | Level 3
Assets:
Safeguarding asset for crypto	0	0
Total assets	0	0
Liabilities:
Safeguarding obligation for crypto	0	0
Total liabilities	20,078	0
Fair Value, Recurring | Level 3 | U.S. treasury bonds
Assets:
U.S. Treasury debt securities	0	0
Class 1 and Class 2 warrants | Fair Value, Recurring
Liabilities:
Warrant liability	20,078
Class 1 and Class 2 warrants | Fair Value, Recurring | Level 1
Liabilities:
Warrant liability	0
Class 1 and Class 2 warrants | Fair Value, Recurring | Level 2
Liabilities:
Warrant liability	0
Class 1 and Class 2 warrants | Fair Value, Recurring | Level 3
Liabilities:
Warrant liability	20,078
Public Warrants | Fair Value, Recurring
Liabilities:
Warrant liability	928	2,356
Public Warrants | Fair Value, Recurring | Level 1
Liabilities:
Warrant liability	928	2,356
Public Warrants | Fair Value, Recurring | Level 2
Liabilities:
Warrant liability	0	0
Public Warrants | Fair Value, Recurring | Level 3
Liabilities:
Warrant liability	$ 0	$ 0