Segment Information - Additional Information (Detail) (USD $)	12 Months Ended			2 Months Ended	0 Months Ended		1 Months Ended	3 Months Ended			12 Months Ended				0 Months Ended	12 Months Ended	0 Months Ended	12 Months Ended								0 Months Ended	1 Months Ended	3 Months Ended	1 Months Ended
	Dec. 31, 2013 Segment	Dec. 31, 2012	Dec. 31, 2011	Feb. 27, 2014 Subsequent Event [Member]	Jun. 30, 2012 Gold Peak [Member]	Mar. 13, 2012 Gold Peak [Member]	Mar. 31, 2012 Gold Peak [Member]	Dec. 31, 2012 Gold Peak [Member]	Jun. 30, 2012 Gold Peak [Member]	Mar. 31, 2012 Gold Peak [Member]	Dec. 31, 2013 Gold Peak [Member]	Dec. 31, 2012 Gold Peak [Member]	Dec. 31, 2011 Gold Peak [Member]	Sep. 30, 2009 Gold Peak [Member] Segment acre	Aug. 03, 2012 Gold Peak [Member] First Installment [Member]	Dec. 31, 2013 Gold Peak [Member] First Installment [Member]	Oct. 15, 2012 Gold Peak [Member] Second Installment [Member]	Dec. 31, 2013 Gold Peak [Member] Second Installment [Member]	Dec. 31, 2013 Reis Services [Member] Subscriber	Dec. 31, 2012 Reis Services [Member] Subscriber	Dec. 31, 2011 Reis Services [Member]	Dec. 31, 2013 Reis Services [Member] Minimum [Member] Subscriber	Dec. 31, 2012 Reis Services [Member] Minimum [Member] Subscriber	Dec. 31, 2013 Reis Services [Member] Maximum [Member]	Dec. 31, 2012 Reis Services [Member] Maximum [Member]	Apr. 20, 2011 East Lyme [Member] Home acre	Apr. 30, 2011 East Lyme [Member]	Jun. 30, 2011 East Lyme [Member]	Feb. 28, 2011 Claverack [Member]	Feb. 28, 2010 Claverack [Member] acre
Segment Reporting Information [Line Items]
Numbers of segments	2
Threshold percentage of Reis Service's revenue by subscribers																			3.40%	4.20%	4.90%
Aggregate percentage of accounts receivable accounted for by subscribers																			59.10%	58.20%
Number of subscribers contributing largest share among major accounts receivable																			25	24		4	2
Percentage of accounts receivable accounted for by major subscribers																						4.00%	5.00%	10.40%	11.10%
Payments received against accounts receivable				$ 9,079,000
Percentage collected from trade accounts receivable				79.20%
Threshold percentage of deferred revenue by subscribers																			5.90%	6.60%
Number of acres prior to sale														29												224				235
Number of single family homes																										161
Gross sales																											1,800,000
Cash received from the release of deposits and escrow																											792,000
Net cash received from the sale of project																											2,600,000
Gain on sale																												1,242,000
Letter of Credit	212,000																									3,000,000	400,000
Proceed in satisfaction of mortgage note and accrued interest																													455,000
Number of units														259
Litigation charge regarding construction defects						18,200,000	18,200,000
Other charges regarding construction defects						756,000
Litigation charge	(80,000)	11,547,000	4,460,000							14,216,000		11,547,000	4,460,000
Reversal of litigation charge									1,956,000
Settlement with the plaintiff					17,000,000
Installment amount due															5,000,000		12,000,000
Installment due date																Aug. 03, 2012		Oct. 15, 2012
Litigation recovery								$ 712,500			$ 80,000	$ 712,500