Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation - TripCo Grants (Details)

v3.19.3.a.u2
Stock-Based Compensation - TripCo Grants (Details) - 2019 Plan - $ / shares
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Stock-Based Compensation      
Maximum number of shares 5,000,000.0    
Fair value assumptions      
Volatility rate, minimum (as a percent) 49.10% 49.10% 49.10%
Volatility rate, maximum (as a percent) 54.20% 54.20% 54.20%
Dividend rate 0.00%    
Minimum      
Stock-Based Compensation      
Vesting period 1 year    
Term of awards 7 years    
Fair value assumptions      
Expected term 4 years 9 months 18 days 4 years 9 months 18 days 4 years 9 months 18 days
Maximum      
Stock-Based Compensation      
Vesting period 5 years    
Term of awards 10 years    
Fair value assumptions      
Expected term 6 years 3 months 18 days 6 years 3 months 18 days 6 years 3 months 18 days
Series A | Stock Options      
Stock-Based Compensation      
Granted 151,000    
Cancelled or expired 4,000    
Series A | Stock Options | Employee      
Stock-Based Compensation      
Granted 73,000    
Weighted average grant date fair value, options (in dollars per share) $ 3.53    
Series A | Stock Options | Employee | Minimum      
Stock-Based Compensation      
Vesting period 3 years    
Series A | Stock Options | Employee | Maximum      
Stock-Based Compensation      
Vesting period 5 years    
Series A | Stock Options | Nonemployee      
Stock-Based Compensation      
Vesting period 1 year    
Granted 79,000 59,000 105,000
Weighted average grant date fair value, options (in dollars per share) $ 3.42 $ 8.83 $ 4.11
Series B | Stock Options      
Stock-Based Compensation      
Granted 27,000    
Series B | Stock Options | Nonemployee      
Stock-Based Compensation      
Exercised 0    
Cancelled or expired 0    
Series B | Stock Options | CEO      
Stock-Based Compensation      
Granted 27,000    
Weighted average grant date fair value, options (in dollars per share) $ 6.41    
Series B | Performance Based RSU's | CEO      
Stock-Based Compensation      
Vesting period 1 year    
RSUs granted 35,000    
Weighted average grant date fair value, RSUs (in dollars per share) $ 14.17    
Series B | Time Based RSU's | CEO      
Stock-Based Compensation      
Granted 320,000    
Weighted average grant date fair value, RSUs (in dollars per share) $ 7.23