Investment in Unconsolidated Joint Venture (Details) (USD $)	3 Months Ended				9 Months Ended
	Sep. 30, 2013	Aug. 31, 2013	Sep. 30, 2012	Aug. 31, 2012	Sep. 30, 2013	Aug. 31, 2013	Sep. 30, 2012	Aug. 31, 2012	Dec. 31, 2012
Investment in unconsolidated joint venture
Investments in and advance to affiliates, subsidiaries, associates, and joint venture	$ 5,390,000				$ 5,390,000				$ 4,924,000
Income (loss) from equity method investments	585,000		290,000		1,650,000		710,000
Builders Digital Experience LLC
Investment in unconsolidated joint venture
Investments in and advance to affiliates, subsidiaries, associates, and joint venture	5,400,000				5,400,000				4,900,000
Income (loss) from equity method investments	600,000		300,000		1,700,000		700,000
Period in arrears for recognition of proportionate share of earnings					1 month
Summarized income statement information
Revenue		5,317,000		4,710,000		14,902,000		13,684,000
Costs and expenses:
Cost of revenue		889,000		807,000		2,467,000		2,382,000
Operating expenses		3,218,000		3,298,000		9,000,000		9,793,000
Costs and expenses		4,107,000		4,105,000		11,467,000		12,175,000
Income before income taxes		1,210,000		605,000		3,435,000		1,509,000
Income tax expense		40,000		26,000		135,000		89,000
Net income		1,170,000		579,000		3,300,000		1,420,000
Cash distributions from unconsolidated joint venture					$ 1,200,000		$ 1,000,000