SHARE-BASED COMPENSATION - (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Private Innovate 2015 Stock Incentive Plan        
Expected dividend yield 0.00% 0.00% 0.00% 0.00%
Expected stock price volatility 0.00%   67.00%  
Risk-free interest rate 0.00%   2.60%  
Term of options 0 days      
Private Innovate 2015 Stock Incentive Plan | Minimum        
Expected stock price volatility   67.00%   67.00%
Risk-free interest rate   2.80%   2.70%
Term of options   8 years 8 months 12 days 8 years 2 months 12 days 8 years 8 months 12 days
Private Innovate 2015 Stock Incentive Plan | Maximum        
Expected stock price volatility   68.00%   72.00%
Risk-free interest rate   2.90%   2.90%
Term of options   9 years 3 months 18 days 8 years 8 months 12 days 9 years 6 months
Omnibus Incentive Plan 2012        
Expected dividend yield 0.00%   0.00%  
Expected stock price volatility 70.00%      
Term of options 5 years 8 months 12 days      
Omnibus Incentive Plan 2012 | Minimum        
Expected stock price volatility     68.00%  
Risk-free interest rate 2.00%   2.00%  
Term of options     5 years 4 months 24 days  
Omnibus Incentive Plan 2012 | Maximum        
Expected stock price volatility     72.00%  
Risk-free interest rate 2.20%   2.70%  
Term of options     10 years