Statements of Changes in Shareholders' Equity and Redeemable Capital Shares (Unaudited) - USD ($)	Total	Retained Earnings [Member]	Redeemable Capital Shares [Member]
Balance, Shares at Dec. 31, 2018			1,100,000
Balance at Dec. 31, 2018			$ 135,895,374
Purchases of Shares			$ 18,986,604
Purchases of Shares, Shares			150,000
Redemption of Shares			$ (31,438,493)
Redemption of Shares, Shares			(250,000)
Net Increase (Decrease) due to Share Transactions			$ (12,451,889)
Net Increase (Decrease) due to Share Transactions, Shares			(100,000)
Net Comprehensive Income (Loss)	$ (15,347)	$ (15,347)
Adjustment of Redeemable Capital Shares to Redemption Value related to Retained Earnings	$ 15,347	15,347	$ (15,347)
Adjustment of Redeemable Capital Shares to Redemption Value			$ 2,955,213
Balance, Shares at Mar. 31, 2019			1,000,000
Balance at Mar. 31, 2019			$ 126,383,351
Balance, Shares at Dec. 31, 2019	1,300,000		1,300,000
Balance at Dec. 31, 2019	$ 166,971,382		$ 166,971,382
Purchases of Shares			$ 23,988,103
Purchases of Shares, Shares			200,000
Redemption of Shares			$ (25,254,708)
Redemption of Shares, Shares			(200,000)
Net Increase (Decrease) due to Share Transactions			$ (1,266,605)
Net Increase (Decrease) due to Share Transactions, Shares			0
Net Comprehensive Income (Loss)	(46,964)	(46,964)
Adjustment of Redeemable Capital Shares to Redemption Value related to Retained Earnings	$ 46,964	$ 46,964	$ (46,964)
Adjustment of Redeemable Capital Shares to Redemption Value			$ (9,422,136)
Balance, Shares at Mar. 31, 2020	1,300,000		1,300,000
Balance at Mar. 31, 2020	$ 156,235,677		$ 156,235,677