LONG-TERM DEBT - Scheduled Principal Balances (Details)	12 Months Ended
	Dec. 31, 2019 USD ($)
Debt Instrument [Line Items]
Scheduled Principal Payments	$ 27,481,000
Debt Instrument, Redemption, Period One [Member]
Debt Instrument [Line Items]
Scheduled Principal Payments	21,000
Debt Instrument, Redemption, Period Two [Member]
Debt Instrument [Line Items]
Scheduled Principal Payments	22,000
Debt Instrument, Redemption, Period Three [Member]
Debt Instrument [Line Items]
Scheduled Principal Payments	23,000
Debt Instrument, Redemption, Period Four [Member]
Debt Instrument [Line Items]
Scheduled Principal Payments	24,000
Debt Instrument, Redemption, Period Five [Member]
Debt Instrument [Line Items]
Scheduled Principal Payments	25,000
Debt Instrument, Redemption, Thereafter [Member]
Debt Instrument [Line Items]
Scheduled Principal Payments	$ 27,366,000