Property and Equipment (Details) (USD $)	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Impairment charges	$ 840,000
Total property and equipment			19,553,000	19,213,000
Less: accumulated depreciation			(15,571,000)	(15,114,000)
Net carrying value			3,982,000	4,099,000
Depreciation expense	390,000	744,000
Furniture and office equipment [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment			3,247,000	3,202,000
Headend facilities and machinery [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment			16,072,000	15,779,000
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment			179,000	178,000
Vehicles [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment			$ 55,000	$ 54,000