LEASES (Details) - USD ($)		3 Months Ended		9 Months Ended
	Feb. 28, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Mar. 15, 2018	Dec. 31, 2017	Sep. 30, 2013
Leases
Lease term		1 year		1 year				3 years
Restricted cash		$ 2,178,000		$ 2,178,000			$ 134,000
Lease cost
Operating lease cost		99,000	$ 99,000	296,000	$ 296,000
Short-term lease cost		55,000		117,000
Total lease cost		154,000	99,000	413,000	296,000
Operating cash flows from operating leases		$ 103,000	$ 100,000	$ 307,000	$ 296,000
Remaining lease term		3 months 29 days		3 months 29 days			1 year 29 days
Discount rate (as a percent)		6.50%		6.50%			6.50%
Watertown Lease
Leases
Lease term	8 years
Restricted cash		$ 2,000,000		$ 2,000,000				$ 84,000
Existence of option to extend	true
Waverley Oaks Lease
Leases
Lease term						1 year