OTHER ASSETS, NET (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Mar. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Other Assets [Line Items]
Contract assets - long-term	$ 6,033			$ 7,231
Lease assets	3,371		$ 4,048	0
Deferred tax assets	295			295
Other assets	6,811			301
Total other assets, net	$ 16,510			$ 7,827
ASU 2016-02
Other Assets [Line Items]
Lease assets			$ 4,000
Other assets, net
Other Assets [Line Items]
Deposit asset		$ 6,900