STOCKHOLDERS' EQUITY - Preferred Stock (Details)		3 Months Ended		6 Months Ended		12 Months Ended
	May 19, 2020 shares	Jun. 30, 2020 vote shares	Jun. 30, 2019 shares	Jun. 30, 2020 vote $ / shares shares	Jun. 30, 2019 shares	Dec. 31, 2019 $ / shares shares	Dec. 31, 2018 $ / shares shares	Mar. 31, 2020 shares	Mar. 31, 2019 shares
Class of Stock [Line Items]
Number of Votes Per Common Share Held | vote		1		1
Preferred Stock, Dividend Rate, Per-Dollar-Amount | $ / shares				$ 0.16
Dividend paid (in usd per share) | $ / shares						$ 0.16	$ 0.16
Series A-1 Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, shares outstanding		4,204,000		4,204,000		4,210,000
Preferred Stock Dividends, Shares						4,085,000
Preferred Stock Dividends, Shares	4,079,000
Number of convertible preferred shares upon conversion (in shares)		1		1
Preferred stock | Series A Preferred Stock
Class of Stock [Line Items]
Shares converted (in shares)		0	1,000	0	1,000
Preferred stock, shares outstanding		0	3,000	0	3,000	0	127,000	0	127,000
Preferred stock | Series A-1 Preferred Stock [Member]
Class of Stock [Line Items]
Shares converted (in shares)		0	123,000	0	123,000
Preferred stock, shares outstanding		4,204,000	123,000	4,204,000	123,000	4,210,000	0	4,210,000	0