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Nature of Business and Significant Accounting Policies (Details)
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2019
USD ($)
segment
$ / shares
shares
Dec. 31, 2018
USD ($)
$ / shares
shares
Nov. 26, 2018
Nature of business      
Number of operating segments | segment 1    
Numerator for loss per common share calculation:      
Net loss attributable to Hemisphere Media Group, Inc. | $ $ (3,367) $ (10,906)  
Denominator for loss per common share calculation:      
Weighted-average common shares, basic 39,158 38,986  
Effect of dilutive securities      
Weighted-average common shares, diluted 39,158 38,986  
Loss per share attributable to Hemisphere Media Group, Inc.      
Basic (in dollars per share) | $ / shares $ (0.09) $ (0.28)  
Diluted (in dollars per share) | $ / shares $ (0.09) $ (0.28)  
Shares excluded from the computation of diluted loss per common share 1,300 1,600  
Outstanding awards excluded from computation of diluted loss per share 700 400  
Snap Media      
Nature of business      
Voting interest acquired (as a percent)     75.00%