STOCKHOLDERS' EQUITY - Preferred Stock (Details)		3 Months Ended		9 Months Ended		12 Months Ended
	May 19, 2020 shares	Sep. 30, 2020 vote shares	Sep. 30, 2019 shares	Sep. 30, 2020 vote $ / shares shares	Sep. 30, 2019 shares	Dec. 31, 2019 $ / shares shares	Dec. 31, 2018 $ / shares shares	Jun. 30, 2020 shares	Jun. 30, 2019 shares
Class of Stock [Line Items]
Preferred Stock, Number of Votes | 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 Dividends, Ratio Of Number Of Shares Issued For Each Common Share	0.10
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	2,000
Preferred stock, shares outstanding		0	0	0	0	0	127,000	0	3,000
Preferred stock | Series A-1 Preferred Stock [Member]
Class of Stock [Line Items]
Shares converted (in shares)		0	2,000	0	125,000
Preferred stock, shares outstanding		4,204,000	3,702,000	4,204,000	3,702,000	4,210,000	0	4,204,000	123,000
Preferred Stock Dividends, Shares		0	3,577,000	0	3,577,000