OTHER ASSETS (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Mar. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Other Assets [Abstract]
Contract assets - long-term	$ 7,136			$ 7,231
Lease assets	3,628		$ 4,048	0
Deferred tax assets	337			295
Other assets	7,170			301
Total other assets	$ 18,271			$ 7,827
Other assets, net
Other Assets [Line Items]
Deposit asset		$ 6,900