QUARTERLY FINANCIAL INFORMATION (UNAUDITED) - (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 29, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Selected Quarterly Financial Information [Abstract]
Revenues, net	$ 34,884	$ 25,694	$ 22,946	$ 24,170	$ 25,584	$ 19,517	$ 18,614	$ 20,969	$ 107,694	$ 84,684
Operating income (loss)	1,563	1,194	512	497	343	(446)	(768)	(480)	3,766	(1,351)
Net income (loss)	$ 1,485	$ 1,105	$ 441	$ 445	$ 294	$ (490)	$ (816)	$ (526)	$ 3,476	$ (1,538)
Net income (loss) per share-basic (in dollars per share)	$ 0.11	$ 0.08	$ 0.03	$ 0.03	$ 0.02	$ (0.04)	$ (0.06)	$ (0.04)	$ 0.27	$ (0.12)
Net income (loss) per share-diluted (in dollars per share)	$ 0.11	$ 0.08	$ 0.03	$ 0.03	$ 0.02	$ (0.04)	$ (0.06)	$ (0.04)	$ 0.27	$ (0.12)