Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Schedule of Fair Value, Assets and Liabilities Measured on Recurring and Non-Recurring Basis (Details)

v3.20.1
Fair Value Measurements - Schedule of Fair Value, Assets and Liabilities Measured on Recurring and Non-Recurring Basis (Details) - USD ($)
Mar. 31, 2020
Dec. 31, 2019
Short Term Investment [Member] | Fair Value Measurements Recurring [Member]    
Fair value disclosure of assets $ 75,887,000  
Short Term Investment [Member] | Fair Value Measurements Recurring [Member] | Fair Value Inputs Level 1 [Member]    
Fair value disclosure of assets  
Short Term Investment [Member] | Fair Value Measurements Recurring [Member] | Fair Value Inputs Level 2 [Member]    
Fair value disclosure of assets 75,887,000  
Short Term Investment [Member] | Fair Value Measurements Recurring [Member] | Fair Value Inputs Level 3 [Member]    
Fair value disclosure of assets  
Licensed Technology Net [Member] | Fair Value Measurements Nonrecurring [Member]    
Fair value disclosure of assets 1,968,000 $ 36,178,000
Licensed Technology Net [Member] | Fair Value Measurements Nonrecurring [Member] | Fair Value Inputs Level 1 [Member]    
Fair value disclosure of assets
Licensed Technology Net [Member] | Fair Value Measurements Nonrecurring [Member] | Fair Value Inputs Level 2 [Member]    
Fair value disclosure of assets
Licensed Technology Net [Member] | Fair Value Measurements Nonrecurring [Member] | Fair Value Inputs Level 3 [Member]    
Fair value disclosure of assets 1,968,000 36,178,000
Goodwill [Member] | Fair Value Measurements Nonrecurring [Member]    
Fair value disclosure of assets 32,466,000 32,466,000
Goodwill [Member] | Fair Value Measurements Nonrecurring [Member] | Fair Value Inputs Level 1 [Member]    
Fair value disclosure of assets
Goodwill [Member] | Fair Value Measurements Nonrecurring [Member] | Fair Value Inputs Level 2 [Member]    
Fair value disclosure of assets
Goodwill [Member] | Fair Value Measurements Nonrecurring [Member] | Fair Value Inputs Level 3 [Member]    
Fair value disclosure of assets $ 32,466,000 $ 32,466,000