INCOME TAXES (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Deferred tax assets:
Reserves and accruals	$ 979	$ 1,470
Goodwill/Intangible assets	396	721
Net operating loss carryforwards	2,074	1,653
Stock-based compensation	2,437	2,441
Charitable contribution carryforward	122	1,432
Deferred tax asset, other	608	1,014
Total deferred tax asset	6,616	8,731
Valuation allowance	(817)	0
Deferred tax assets, net of valuation allowance	5,799	8,731
Deferred tax liability:
Property and equipment	(2,597)	(1,791)
Net deferred tax asset	$ 3,202	$ 6,940