ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES - Capital Raising Activities (Narrative) (Details) - USD ($)		3 Months Ended				5 Months Ended	6 Months Ended		12 Months Ended	24 Months Ended
	Aug. 02, 2019	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Aug. 11, 2019
Subsidiary, Sale of Stock [Line Items]
Proceeds From Issuance Of Common Stock, net of issuance costs							$ 19,447,000	$ 36,998,000
Stock Issued During Period, Value, New Issues		$ 0	$ 19,447,000	$ 28,495,000	$ 8,503,000		$ 19,447,000		$ 92,314,000
Total shares issued under distribution agreement			3,171,000				3,170,727,000		14,377,126
At the Market Offering Program [Member]
Subsidiary, Sale of Stock [Line Items]
Proceeds From Issuance Of Common Stock, net of issuance costs						$ 19,400,000				$ 123,100,000
Stock Issued During Period, Value, New Issues						$ 19,800,000				$ 125,000,000
Total shares issued under distribution agreement						3,170,727				15,123,178
At the Market Offering Program [Member] | Maximum [Member]
Subsidiary, Sale of Stock [Line Items]
Stock Issued During Period, Value, New Issues						$ 200,000,000				$ 125,000,000
Follow-on Offering [Member]
Subsidiary, Sale of Stock [Line Items]
Stock Issued During Period, Value, New Issues	$ 44,200,000
Total shares issued under distribution agreement	7,000,000
Share Price	$ 6.3535