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Related Party Transactions (Details) - USD ($)
$ in Thousands
Feb. 26, 2019
Jul. 31, 2014
Dec. 31, 2019
5 Elements Global Advisors      
Related Party Transaction [Line Items]      
Ownership in reporting entity by related party     2.50%
5 Elements Efficiencies (BVI) Ltd.      
Related Party Transaction [Line Items]      
Ownership in reporting entity by related party     2.40%
5 Elements Efficiencies (BVI) Ltd. | Yeh-Mei Cheng      
Related Party Transaction [Line Items]      
Ownership interest   50.00%  
13D Group      
Related Party Transaction [Line Items]      
Amount invested $ 1,700    
Ownership in reporting entity by related party 17.60%    
13D Group | James Tu Through Fusion Park LLC      
Related Party Transaction [Line Items]      
Amount invested $ 580    
13D Group | Brilliant Start Enterprise, Inc.      
Related Party Transaction [Line Items]      
Amount invested $ 500    
Communal      
Related Party Transaction [Line Items]      
Ownership in reporting entity by related party   5.00%  
Communal | 5 Elements Efficiencies (BVI) Ltd.      
Related Party Transaction [Line Items]      
Ownership interest   50.00%