LEASES - Operating Lease (Details) $ in Thousands	Jun. 30, 2019 USD ($)
Operating lease right of use assets and lease liabilities included on the unaudited condensed consolidated balance sheets
Right of use assets	$ 1,499
Other assets	us-gaap:OtherAssetsNoncurrent
Lease liabilities, current	$ 731
Other current liabilities	us-gaap:OtherLiabilitiesCurrent
Lease liabilities, noncurrent	$ 768
Other long-term liabilities	us-gaap:OtherLiabilitiesNoncurrent
Total operating lease liabilities	$ 1,499
Weighted average remaining lease term (in years)	2 years 2 months 12 days
Weighted average discount rate	5.80%