DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Allowance for Doubtful Accounts) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance at beginning of the year	$ 400	$ 140	$ 117
Provision for doubtful accounts	400	911	179
Write-offs	0	(651)	(156)
Balance at end of the year	$ 800	$ 400	$ 140