Subsequent Events (Details) - USD ($)				1 Months Ended			12 Months Ended
	Apr. 23, 2020	Apr. 06, 2020	Nov. 13, 2019	Sep. 17, 2020	Aug. 17, 2020	Jun. 17, 2020	Jun. 30, 2020	Jun. 30, 2019	Jan. 10, 2020	Nov. 06, 2019	Sep. 03, 2018	Apr. 10, 2018
Subsequent Events (Details) [Line Items]
Ownership percentage									40.00%	90.00%	51.00%	20.00%
Gross proceeds	$ 59,869						$ 940,131	$ 850,000
Aggregate consideration restricted shares						$ 1.5
Subsequent Event [Member]
Subsequent Events (Details) [Line Items]
Securities purchase agreement, description				the Company entered into certain securities purchase agreement (the “SPA”) with certain “non-U.S. Persons” (the “Purchasers”) as defined in Regulation S of the Securities Act of 1933, as amended, pursuant to which the Company agreed to sell an aggregate of 720,000 shares (the “Shares”) of the Company’s common stock, no par value (“Common Stock”), and warrants (the “Warrants”) to purchase 720,000 Shares at a per share purchase price of $1.46 (the “Offering”). The net proceeds to the Company from such Offering will be approximately $1.05 million.
Proceeds from warrants issued				$ 1.825
Warrant description				The Warrants will expire five and a half (5.5) years from its date of issuance. The Warrants are subject to anti-dilution provisions to reflect stock dividends and splits or other similar transactions. The Warrants contain a mandatory exercise right for the Company to force exercise the Warrants if the Company’s common stock trades at or above $4.38 for 20 consecutive trading days, provided, among other things, that the shares issuable upon exercise of the are registered or may be sold pursuant to Rule 144 and the daily trading volume exceeds 60,000 shares of Common Stock per trading day on each trading day in a period of 20 consecutive trading days prior to the applicable date. On September 21 and September 22, 2020, the Company received total gross proceeds of $1.05 million.
Longhe Ship Management (Hong Kong) Co., Limited [Member]
Subsequent Events (Details) [Line Items]
Ownership percentage							100.00%
Share Purchase Agreement [Member]
Subsequent Events (Details) [Line Items]
Subsequent Events, description		On April 6, 2020, the Company entered into a share purchase agreement (the “Agreement”) with Mr. Kelin Wu (the “Seller”) and Mandarine Ocean Ltd, a shipping company registered in the Marshall Islands (“Hanyang Shipping”), to acquire 75% of the capital stock of Hanyang Shipping held by the Seller for an aggregate consideration of up to $3.75 million to be paid in cash and the Company’s restricted shares of common stock.
Mr. Shanming Liang [Member]
Subsequent Events (Details) [Line Items]
Gross proceeds			$ 1,000,000
Mr. Shanming Liang [Member] | Subsequent Event [Member]
Subsequent Events (Details) [Line Items]
Gross proceeds					$ 59,869
Shares issued					1,000,000