STOCKHOLDERS' EQUITY - Disclosures (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Restricted stock activity
Balance at the beginning of the period (in shares)	285,393
Granted (in shares)	263,442
Vested (in shares)	(109,346)
Forfeited (in shares)	(80,807)
Balance at the end of the period (in shares)	358,682	285,393
Future Anticipated Vesting Schedule
2021 (in shares)	97,608
2022 (in shares)	118,253
2023 (in shares)	89,160
2024 (in shares)	53,661
2025 (in shares)	0
Total (in shares)	358,682
Restricted Stock and Restricted Stock Units
Share-based Payment Arrangement, Noncash Expense [Abstract]
Compensation expense	$ 1,339,000	$ 1,880,000
Total fair value of shares vested	1,164,000	1,312,000
Weighted average grant date fair value	3,190,000	2,829,000
Restricted Stock and Restricted Stock Units | Directors
Share-based Payment Arrangement, Noncash Expense [Abstract]
Compensation expense	319,000	343,000
Total fair value of shares vested	315,000	373,000
Weighted average grant date fair value	292,000	302,000
Restricted Stock and Restricted Stock Units | Officers and Employees of the Manager
Share-based Payment Arrangement, Noncash Expense [Abstract]
Compensation expense	1,020,000	1,537,000
Total fair value of shares vested	849,000	939,000
Weighted average grant date fair value	$ 2,898,000	$ 2,527,000
Restricted stock
Share-based Payment Arrangement, Noncash Expense [Abstract]
Compensation expense			$ 1,102,000
Total fair value of shares vested			854,000
Weighted average grant date fair value			2,186,000
Restricted stock | Directors
Restricted stock activity
Balance at the beginning of the period (in shares)	12,332
Granted (in shares)	42,985
Vested (in shares)	(32,993)
Forfeited (in shares)	0
Balance at the end of the period (in shares)	22,324	12,332
Future Anticipated Vesting Schedule
2021 (in shares)	22,324
2022 (in shares)	0
2023 (in shares)	0
2024 (in shares)	0
2025 (in shares)	0
Total (in shares)	22,324
Share-based Payment Arrangement, Noncash Expense [Abstract]
Compensation expense			427,000
Total fair value of shares vested			405,000
Weighted average grant date fair value			427,000
Restricted stock | Officers and Employees of the Manager
Restricted stock activity
Balance at the beginning of the period (in shares)	211,467
Granted (in shares)	0
Vested (in shares)	(65,742)
Forfeited (in shares)	(76,874)
Balance at the end of the period (in shares)	68,851	211,467
Future Anticipated Vesting Schedule
2021 (in shares)	39,775
2022 (in shares)	29,076
2023 (in shares)	0
2024 (in shares)	0
2025 (in shares)	0
Total (in shares)	68,851
Share-based Payment Arrangement, Noncash Expense [Abstract]
Compensation expense			675,000
Total fair value of shares vested			449,000
Weighted average grant date fair value			$ 1,759,000
Restricted Stock Units (RSUs) | Officers and Employees of the Manager
Restricted stock activity
Balance at the beginning of the period (in shares)	61,594
Granted (in shares)	220,457
Vested (in shares)	(10,611)
Forfeited (in shares)	(3,933)
Balance at the end of the period (in shares)	267,507	61,594
Future Anticipated Vesting Schedule
2021 (in shares)	35,509
2022 (in shares)	89,177
2023 (in shares)	89,160
2024 (in shares)	53,661
2025 (in shares)	0
Total (in shares)	267,507