Nature of Business and Significant Accounting Policies - Equity Method Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Nature of Business and Significant Accounting Policies
Investee losses in excess of investment	$ 1,484	$ 4,982

The amount of proportionate share of loss exceeds equity method investments recorded as liability due to our commitment for future capital funding.

No definition available.

Name:	hmtv_LossInExcessOfEquityMethodInvestments
Namespace Prefix:	hmtv_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant