LEASES - Lease information (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Jun. 30, 2018
Lease expenses:
Operating lease expense	$ 81	$ 162
Short term lease expense	29	63
Total lease expense	$ 110	225
Other information related to leases [Abstract]
Operating cash flows from operating leases		169
Right-of-use asset obtained in exchange for operating lease liability		$ 1,860	$ 0
Weighted Average remaining lease term	7 years 2 months 12 days	7 years 2 months 12 days
Weighted-average discount rate - operating leases	2.90%	2.90%