Subsequent Events - Additional Information (Detail) - USD ($)		1 Months Ended	6 Months Ended
	Jul. 08, 2019	Jul. 31, 2019	Jun. 30, 2019
Subsequent Event [Line Items]
Minimum bid price description			minimum bid price per share for its common stock fell below $1.00 for a period of 30 consecutive business days (from May 23, 2019 to July 5, 2019) and that therefore the Company did not meet the minimum bid price requirement set forth in the Nasdaq Listing Rules.
Minimum bid price requirement description			Nasdaq Listing Rule 5810(c)(3)(A), the Company will be provided 180 calendar days, or until January 6, 2020, to regain compliance with the minimum bid price requirement. In accordance with Rule 5810(c)(3)(A), the Company can regain compliance with the minimum bid price requirement, if, at any time during such 180-day period, the closing bid price of the Company’s common stock is at least $1.00 for a minimum period of 10 consecutive business days. If by January 6, 2020, the Company does not regain compliance with the Nasdaq Listing Rules, the Company may be eligible for additional time to regain compliance pursuant to Nasdaq Listing Rule 5810(c)(3)(A)(ii). To qualify, the Company would need to submit a Transfer Application and a $5,000 application fee.
Subsequent Event
Subsequent Event [Line Items]
Transfer application fee	$ 5,000
Subsequent Event | Umbro China Limited
Subsequent Event [Line Items]
Company ownership interest		100.00%
Subsequent Event | Umbro China Limited | MHMC
Subsequent Event [Line Items]
Ownership interest acquired		5.00%
Payments to acquire ownership interest		$ 1,300,000