INCOME TAXES (Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
U.S. federal and state deferred tax liabilities—long term:
Total deferred tax liabilities	$ (16)	$ 0
Components of Foreign Deferred Tax Assets and Liabilities [Abstract]
Total foreign deferred tax liabilities	(16)	0
U.S. Federal and State
U.S. federal and state deferred tax assets—long term:
Accrued payroll	525	95
Fixed assets	80	0
Intangibles	702	763
Research & development credit	1,257	804
Net operating loss	11,515	6,592
Stock compensation	772	379
New jobs credit	7	7
Total long-term assets	14,858	8,640
Total deferred tax assets	14,858	8,640
U.S. federal and state deferred tax liabilities—long term:
Fixed assets	0	(1)
Total deferred tax liabilities	0	(1)
Net deferred tax assets - long term	14,858	8,639
Less: Valuation allowance	(14,858)	(8,639)
Net deferred tax assets	0	0
Components of Foreign Deferred Tax Assets and Liabilities [Abstract]
Net operating loss	11,515	6,592
Total foreign deferred tax assets	14,858	8,640
Total foreign deferred tax liabilities	0	(1)
Foreign
U.S. federal and state deferred tax assets—long term:
Net operating loss	16	0
Total deferred tax assets	16	0
U.S. federal and state deferred tax liabilities—long term:
Total deferred tax liabilities	(32)	0
Components of Foreign Deferred Tax Assets and Liabilities [Abstract]
Net operating loss	16	0
Total foreign deferred tax assets	16	0
Intangibles	(32)	0
Total foreign deferred tax liabilities	(32)	0
Net foreign deferred tax liabilities	$ (16)	$ 0