Quarterly report pursuant to Section 13 or 15(d)

STOCK-BASED COMPENSATION - Assumptions (Details)

v3.19.1
STOCK-BASED COMPENSATION - Assumptions (Details) - Market-based Awards
3 Months Ended
Mar. 31, 2019
$ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Risk-free interest rate 2.57%
Dividend yield 0.00%
Expected volatility 85.00%
Company's closing stock price on grant date (dollars per share) $ 2.71