REPURCHASE AGREEMENTS - Amounts at Risk (Details)	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Repurchase Agreement Counterparty [Line Items]
Repurchase Agreement Counterparty, Amount at Risk	$ 11,800,000	$ 12,400,000
Edf Man [Member]
Repurchase Agreement Counterparty [Line Items]
Repurchase Agreement Counterparty, Amount at Risk	$ 3,012,000
Repurchase Agreement Counterparty, Weighted Average Maturity	17 days
Equity At Risk	0.139
Mirae Asset Securities (USA) Inc [Member]
Repurchase Agreement Counterparty [Line Items]
Repurchase Agreement Counterparty, Amount at Risk	$ 2,908,000
Repurchase Agreement Counterparty, Weighted Average Maturity	40 days
Equity At Risk	0.121