Segment Information - Additional Information (Detail) (USD $)	0 Months Ended		3 Months Ended		9 Months Ended		12 Months Ended			0 Months Ended					0 Months Ended	9 Months Ended	0 Months Ended	9 Months Ended			1 Months Ended
	Jun. 20, 2012	Mar. 13, 2012	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 Segment	Sep. 30, 2013	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2009 Segment	Aug. 03, 2012 First Installment [Member]	Oct. 15, 2012 Second Installment [Member]	Jun. 20, 2012 Gold Peak [Member]	Mar. 13, 2012 Gold Peak [Member]	Sep. 30, 2009 Gold Peak [Member] Segment acre	Aug. 03, 2012 Gold Peak [Member] First Installment [Member]	Sep. 30, 2014 Gold Peak [Member] First Installment [Member]	Oct. 15, 2012 Gold Peak [Member] Second Installment [Member]	Sep. 30, 2014 Gold Peak [Member] Second Installment [Member]	Sep. 30, 2014 Reis Services [Member] Subscriber	Sep. 30, 2013 Reis Services [Member]	Oct. 24, 2014 Reis Services [Member] Subsequent Event [Member]	Sep. 30, 2014 Reis Services [Member] Maximum [Member]
Segment Reporting Information [Line Items]
Numbers of segments					2
Threshold percentage of Reis Service's revenue by subscribers																			2.90%	3.50%
Number of subscribers contributing largest share among major accounts receivable																			7
Aggregate percentage of accounts receivable accounted for by subscribers																			36.50%
Percentage of accounts receivable accounted for by major subscriber																						10.20%
Payments received against accounts receivable																					$ 2,389,000
Percentage collected from trade accounts receivable																					34.00%
Threshold percentage of deferred revenue by subscribers																			3.30%
Number of units									259					259
Number of acres prior to sale														29
Litigation charge regarding construction defects		18,200,000											18,200,000
Other charges regarding construction defects		756,000											756,000
Settlement with the plaintiff	17,000,000											17,000,000
Installment amount due										5,000,000	12,000,000				5,000,000		12,000,000
Installment due date																Aug. 03, 2012		Oct. 15, 2012
Litigation recoveries			$ 10,000	$ 0	$ 26,000	$ 80,000	$ 80,000	$ 712,500