Statements of Changes in Shareholders' Equity and Redeemable Capital Shares - USD ($)	Total	Retained Earnings [Member]	Redeemable Capital Shares [Member]
Balance at Dec. 31, 2017			$ 106,486,768
Purchases of Shares	$ 79,698,689		79,698,689
Redemption of Shares	(8,852,936)		(8,852,936)
Net Increase (Decrease) due to Share Transactions			70,845,753
Net Comprehensive Income (Loss)	(175,476)	$ (175,476)
Adjustment of Redeemable Capital Shares to Redemption Value related to Retained Earnings	175,476	175,476	(175,476)
Adjustment of Redeemable Capital Shares to Redemption Value			7,598,308
Balance at Mar. 31, 2018			184,755,353
Balance at Dec. 31, 2018			174,062,164
Purchases of Shares	239,934,251		239,934,251
Redemption of Shares	(230,772,038)		(230,772,038)
Net Increase (Decrease) due to Share Transactions			9,162,213
Net Comprehensive Income (Loss)	(345,819)	(345,819)
Adjustment of Redeemable Capital Shares to Redemption Value related to Retained Earnings	$ 345,819	$ 345,819	(345,819)
Adjustment of Redeemable Capital Shares to Redemption Value			(6,256,380)
Balance at Mar. 31, 2019			$ 176,622,178

Temporary equity issue period increase or decrease related to retained earnings.

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Temporary equity period increase decrease due to share transactions.

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Temporary Equity Stock Redeemed During Period Value New Issues

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- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.

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Change in the value of each type or class of stock classified as temporary equity during the period. The redemption requirement does not constitute an unconditional obligation that will be settled in a variable number of shares constituting a monetary value predominantly indexed to (a) a fixed monetary amount known at inception, (b) an amount inversely correlated with the residual value of the entity, or (c) an amount determined by reference to something other than the fair value of issuer's stock. Does not include mandatorily redeemable stock. The exception is if redemption is required upon liquidation or termination of the reporting entity.

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Value of new stock classified as temporary equity issued during the period.

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