CAPITAL STOCK - Completed public offerings ofcommon stock (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019
Stock Issued During Period Shares New Issues	3,171,000			1,268,000
Stock Issued During Period, Value, New Issues	$ 19,447,000			$ 8,503,000
At the Market Offering Program [Member]
Weighted Average Price Received Per Share	$ 6.23	$ 6.37	$ 6.7	$ 6.84
Stock Issued During Period Shares New Issues	3,170,727	1,771,301	4,337,931	1,267,894
Stock Issued During Period, Value, New Issues	$ 19,447,000	$ 11,098,000	$ 28,495,000	$ 8,503,000
Follow-on Offering [Member]
Weighted Average Price Received Per Share		$ 6.35
Stock Issued During Period Shares New Issues		7,000,000
Stock Issued During Period, Value, New Issues		$ 44,218,000