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SHARE-BASED COMPENSATION - Weighted Average Assumptions (Details)
12 Months Ended
Oct. 04, 2018
Dec. 31, 2018
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Volatility 98.20% 105.60%  
Risk-free interest rate 2.90% 2.50%  
Private Innovate 2015 Stock Incentive Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Dividend yield   0.00% 0.00%
Private Innovate 2015 Stock Incentive Plan | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Volatility   72.00% 76.00%
Risk-free interest rate   3.10% 2.43%
Expected term (years)   9 years 10 months 24 days 10 years
Private Innovate 2015 Stock Incentive Plan | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Volatility   66.00% 73.00%
Risk-free interest rate   2.60% 1.33%
Expected term (years)   8 years 2 months 12 days 5 years
Omnibus Incentive Plan 2012      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Dividend yield   0.00%  
Omnibus Incentive Plan 2012 | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Volatility   73.00%  
Risk-free interest rate   3.10%  
Expected term (years)   10 years  
Omnibus Incentive Plan 2012 | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Volatility   65.00%  
Risk-free interest rate   2.70%  
Expected term (years)   5 years