DISPOSITION OF ASSETS AND DISCONTINUED OPERATIONS: (Details) (USD $) In Thousands, 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. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Net revenue											$ 257	$ 432	$ 608
Operating expenses											(685)	(749)	(816)
Depreciation and amortization											(62)	(73)	(56)
Interest income											353	210	0
Gain (loss) on sale of assets											0	20	(12)
Loss before income taxes											(137)	(160)	(276)
Loss from discontinued operations, net of tax	$ (117)	$ (25)	$ 20	[1]	$ (15)	$ (109)	[2]	$ (21)	$ (22)	$ (8)	$ (137)	$ (160)	$ (276)

[1] The net income from continuing operations for the quarter ended June 30, 2012 includes $313,000 of pre-tax impairment charges.

[2] The net loss from continuing operations for the quarter ended December 31, 2011 includes approximately $22.3 million of pre-tax impairment charges.