Legal Proceedings	9 Months Ended
Mar. 31, 2020
Legal Proceedings [Abstract]
Legal Proceedings	(11) Legal Proceedings Samuel Masucci III and Bernard Karol, principals of the Sponsor, were defendants, along with certain affiliates of the Sponsor, in an action filed May 2, 2017 in the Superior Court of New Jersey captioned PureShares, LLC d/b/a PureFunds et al. v. ETF Managers Group, LLC et al., Docket No. C-63-17 (the "PureShares Action"). The PureShares Action alleged claims based on disputes arising out of contractual relationships with ETF Managers Group LLC ("ETFMG"), an affiliate of the Sponsor. The action sought damages in unspecified amounts and injunctive relief based on breach of contract, wrongful termination, and several other theories. Samuel Masucci III, a principal of the Sponsor, was a defendant, along with certain affiliates of the Sponsor, in a case filed on October 26, 2017 in the United States District Court for the Southern District of New York by NASDAQ, Inc. ("Nasdaq") captioned Nasdaq, Inc. v. Exchange Traded Managers Group, LLC et al., Case 1:17-cv-08252 (the "Nasdaq Action"). This action arose out of the same facts and circumstances as the PureShares Action and asserted claims for breach of contract, conversion and certain other claims with respect to the same exchange traded funds as in the PureShares Action. Mr. Masucci was dismissed as a defendant pursuant to a motion to dismiss in August 2018. The matter was the subject of a bench trial in May 2019, and on December 20, 2019, the Court issued an Opinion and Order awarding compensatory damages to Plaintiff in the amount of $78,403,172.36, plus prejudgment interest. The Court also denied Plaintiff's requests for punitive damages and equitable relief. On May 1, 2020, Nasdaq, PureShares LLC ("PureShares"), and ETFMG announced a global settlement that resolves all claims in both the PureShares Action and the Nasdaq Action. The settlement is subject to future negotiations and approvals among independent third parties. As part of the settlement, Nasdaq and ETFMG have agreed to certain cash payments from ETFMG to Nasdaq and PureShares, and have executed an asset purchase agreement to transfer certain ETFMG intellectual property and related assets, to a Nasdaq affiliate. The transaction is expected to close in the last half of 2020. While the Sponsor does not believe that a resolution of these matters will have a material adverse effect on the Funds' financial statements, if the events set forth in the settlement agreement do not occur, and a subsequent settlement is not reached, the resulting conditions may adversely affect the Sponsor's future operations.

Legal Proceedings

9 Months Ended

Mar. 31, 2020

(11) Legal Proceedings

Samuel Masucci III and Bernard Karol, principals of the Sponsor, were defendants, along with certain affiliates of the Sponsor, in an action filed May 2, 2017 in the Superior Court of New Jersey captioned PureShares, LLC d/b/a PureFunds et al. v. ETF Managers Group, LLC et al., Docket No. C-63-17 (the "PureShares Action"). The PureShares Action alleged claims based on disputes arising out of contractual relationships with ETF Managers Group LLC ("ETFMG"), an affiliate of the Sponsor. The action sought damages in unspecified amounts and injunctive relief based on breach of contract, wrongful termination, and several other theories.

Samuel Masucci III, a principal of the Sponsor, was a defendant, along with certain affiliates of the Sponsor, in a case filed on October 26, 2017 in the United States District Court for the Southern District of New York by NASDAQ, Inc. ("Nasdaq") captioned Nasdaq, Inc. v. Exchange Traded Managers Group, LLC et al., Case 1:17-cv-08252 (the "Nasdaq Action"). This action arose out of the same facts and circumstances as the PureShares Action and asserted claims for breach of contract, conversion and certain other claims with respect to the same exchange traded funds as in the PureShares Action. Mr. Masucci was dismissed as a defendant pursuant to a motion to dismiss in August 2018. The matter was the subject of a bench trial in May 2019, and on December 20, 2019, the Court issued an Opinion and Order awarding compensatory damages to Plaintiff in the amount of $78,403,172.36, plus prejudgment interest. The Court also denied Plaintiff's requests for punitive damages and equitable relief.

On May 1, 2020, Nasdaq, PureShares LLC ("PureShares"), and ETFMG announced a global settlement that resolves all claims in both the PureShares Action and the Nasdaq Action. The settlement is subject to future negotiations and approvals among independent third parties. As part of the settlement, Nasdaq and ETFMG have agreed to certain cash payments from ETFMG to Nasdaq and PureShares, and have executed an asset purchase agreement to transfer certain ETFMG intellectual property and related assets, to a Nasdaq affiliate. The transaction is expected to close in the last half of 2020. While the Sponsor does not believe that a resolution of these matters will have a material adverse effect on the Funds' financial statements, if the events set forth in the settlement agreement do not occur, and a subsequent settlement is not reached, the resulting conditions may adversely affect the Sponsor's future operations.