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Share-Based Compensation - Stock option activity (Details)
 12 Months Ended
Sep. 25, 2020
$ / shares
Aug. 11, 2020
$ / shares
Mar. 31, 2020
$ / shares
Sep. 23, 2019
USD ($)
Dec. 31, 2021
$ / shares
Dec. 31, 2020
$ / shares
Dec. 31, 2019
$ / shares
Dec. 31, 2018
$ / shares
Stock Option 2019 Plan                
Disclosure Of Share Based Payment Arrangements Explanatory [Line Items]                
Number of units/shares, Balance         578,468 2,226,690    
Number of units/shares, Granted       6,000,000   163,500 2,226,690  
Number of units/shares, Exercised         (524,387) (1,574,869)    
Number of units/shares, Forfeited           (236,853)    
Number of units/shares, Expired         (54,081)      
Number of units/shares, Balance           578,468 2,226,690  
Weighted average exercise price, Balance         $ 2.36 $ 2.27    
Weighted average exercise price, Granted $ 3.35 $ 3.9 $ 2.74     3.05 $ 2.27  
Weighted average exercise price, Exercised         2.37 2.32    
Weighted average exercise price, Forfeited           2.30    
Weighted average exercise price, Expired         $ 2.27      
Weighted average exercise price, Balance           $ 2.36 $ 2.27  
Weighted average remaining contractual term, Granted (in years)           10 months 17 days 1 year 9 months  
Weighted average remaining contractual term, Balance (in years)         0 years 6 months 14 days 1 year 6 months  
Imaging Cayman                
Disclosure Of Share Based Payment Arrangements Explanatory [Line Items]                
Number of units/shares, Balance           0 546,000  
Number of units/shares, Granted             0  
Number of units/shares, Exercised             0  
Number of units/shares, Forfeited             (25,000)  
Number of units/shares, Expired             (521,000)  
Number of units/shares, Balance             0 546,000
Number of units/shares, Exercisable           0    
Weighted average exercise price, Balance           $ 0 $ 0.9139  
Weighted average exercise price, Granted             0  
Weighted average exercise price, Exercised             0  
Weighted average exercise price, Forfeited             0.9139  
Weighted average exercise price, Expired             0.9139  
Weighted average exercise price, Balance             $ 0 $ 0.9139
Weighted average exercise price, Exercisable           $ 0    
Weighted average remaining contractual term, Balance (in years)             0 years 1 year
Imaging Taiwan                
Disclosure Of Share Based Payment Arrangements Explanatory [Line Items]                
Number of units/shares, Exercisable         0      
Weighted average exercise price, Exercisable         $ 0      
Imaging Taiwan | Stock Option 2016 Plan                
Disclosure Of Share Based Payment Arrangements Explanatory [Line Items]                
Number of units/shares, Balance         0 15,000 1,359,000  
Number of units/shares, Granted             0  
Number of units/shares, Exercised             0  
Number of units/shares, Forfeited             (209,000)  
Number of units/shares, Expired           (15,000) (1,135,000)  
Number of units/shares, Balance           0 15,000 1,359,000
Weighted average exercise price, Balance         $ 0 $ 0.9139 $ 0.9139  
Weighted average exercise price, Granted             0  
Weighted average exercise price, Exercised             0  
Weighted average exercise price, Forfeited             0.9139  
Weighted average exercise price, Expired           0.9139 0.9139  
Weighted average exercise price, Balance           $ 0 $ 0.9139 $ 0.9139
Weighted average remaining contractual term, Balance (in years)           0 years 0 years 1 year
Himax Display Inc                
Disclosure Of Share Based Payment Arrangements Explanatory [Line Items]                
Number of units/shares, Balance           0 1,911,000  
Number of units/shares, Granted             0  
Number of units/shares, Exercised             0  
Number of units/shares, Forfeited             (22,200)  
Number of units/shares, Expired             (1,888,800)  
Number of units/shares, Balance             0 1,911,000
Number of units/shares, Exercisable             0  
Weighted average exercise price, Balance           $ 0 $ 1.986  
Weighted average exercise price, Granted             0  
Weighted average exercise price, Exercised             0  
Weighted average exercise price, Forfeited             1.986  
Weighted average exercise price, Expired             1.986  
Weighted average exercise price, Balance             0 $ 1.986
Weighted average exercise price, Exercisable             $ 0  
Weighted average remaining contractual term, Balance (in years)               9 months
CM Visual Technology Corp | Stock options 2021 plan                
Disclosure Of Share Based Payment Arrangements Explanatory [Line Items]                
Number of units/shares, Granted         2,791,000      
Number of units/shares, Forfeited         (120,000)      
Number of units/shares, Balance         2,671,000      
Weighted average exercise price, Granted         $ 0.36      
Weighted average exercise price, Forfeited         0.36      
Weighted average exercise price, Balance         $ 0.36      
Weighted average remaining contractual term, Balance (in years)         3 years 6 months      
Liqxtal Technology Inc | Stock options 2021 plan                
Disclosure Of Share Based Payment Arrangements Explanatory [Line Items]                
Number of units/shares, Granted         1,000,000      
Number of units/shares, Forfeited         (90,000)      
Number of units/shares, Balance         910,000      
Weighted average exercise price, Granted         $ 0.65      
Weighted average exercise price, Forfeited         0.65      
Weighted average exercise price, Balance         $ 0.65      
Weighted average remaining contractual term, Balance (in years)         1 year