STOCKHOLDERS' EQUITY - Authorized, Common and Preferred Stock (Details)	6 Months Ended	12 Months Ended
	Jun. 30, 2020 USD ($) Vote $ / shares shares	Dec. 31, 2019 USD ($) $ / shares shares
STOCKHOLDERS' EQUITY
Total shares authorized	105,500,000	105,500,000
Common stock, authorized shares	100,000,000	100,000,000
Common stock, par value (in dollars per share) | $ / shares	$ 0.0001	$ 0.0001
Preferred stock, authorized shares	5,500,000	5,500,000
Preferred stock, par value (in dollars per share) | $ / shares	$ 0.0001	$ 0.0001
Number of votes per common share | Vote	1
Common stock dividends issued | $	$ 0	$ 0
Common stock, shares issued	40,014,519	39,728,416
Preferred stock, shares issued	0	0