Financial Highlights - Summary of Financial Highlights (Detail) - USD ($)		3 Months Ended		6 Months Ended
		Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Ratios to average net asset value
Net assets at end of period		$ 336,764,715	$ 696,877,179	$ 336,764,715	$ 696,877,179	$ 911,491,438	$ 974,537,662	$ 1,002,394,849	$ 373,240,438
Investor Class [Member]
Investment Company, Financial Highlights [Line Items]
Net asset value per share at beginning of period		$ 45.03	$ 50.68	$ 48.14	$ 24.67
Net increase (decrease) in Net Assets resulting from operations:
Net realized and change in unrealized Gain (Loss) on investments	[1]	(28.22)	(15.77)	(31.07)	10.67
Net investment loss	[1]	(0.17)	(0.26)	(0.43)	(0.70)
Net increase (decrease) in Net Assets resulting from operations		(28.39)	(16.03)	(31.50)	9.98
Net asset value per share at end of period		$ 16.64	$ 34.64	$ 16.64	$ 34.64
Total return		(63.05%)	(31.64%)	(65.43%)	40.46%
Ratios to average net asset value
Expenses	[2]	2.51%	2.15%	2.51%	2.47%
Net investment loss		(2.51%)	(2.15%)	(2.51%)	(2.47%)
Net assets at end of period		$ 336,764,715	$ 696,877,179	$ 336,764,715	$ 696,877,179
Average net assets	[3]	$ 555,162,180	$ 842,533,828	$ 694,185,168	$ 813,204,239
Portfolio turnover		1.03%	3.15%	6.17%	4.70%

[1] Net investment loss per share is calculated by dividing the net investment loss by the average number of shares outstanding during the period. Net realized and change in unrealized gain (loss) on investments is a balancing amount necessary to reconcile the change in net asset value per share with the other per share information.

[2] Annualized.

[3] Based on the average of month-end net assets.