Segment Information (Details) (USD $)	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 8,099,523	$ 4,960,850	$ 19,671,513	$ 22,152,802
Restricted cash and investments	216,430	216,125
Accounts receivable, net	5,603,979	10,694,201
Prepaid and other assets	1,128,960	1,438,829
Total current assets	15,048,892	17,310,005
Furniture, fixtures and equipment, net	786,972	738,490
Intangible assets, net	16,122,120	16,332,596
Deferred tax asset, net	8,331,420	8,557,420
Goodwill	54,824,648	54,824,648
Other assets	277,297	271,257
Total assets	95,391,349	98,034,416
Current liabilities:
Current portion of debt
Accrued expenses and other liabilities	2,569,465	3,902,206
Liability for option cancellations	490,069	296,523
Deferred revenue	16,173,630	18,230,332
Liabilities attributable to discontinued operations	400,704	460,251
Total current liabilities	19,633,868	22,889,312
Other long-term liabilities	537,053	588,484
Deferred tax liability, net
Total liabilities	20,170,921	23,477,796
Total stockholders' equity	75,220,428	74,556,620
Total liabilities and stockholders' equity	95,391,349	98,034,416
Reis Services [Member]
Current assets:
Cash and cash equivalents	7,966,000	4,212,000
Restricted cash and investments	216,000	216,000
Accounts receivable, net	5,604,000	10,694,000
Prepaid and other assets	199,000	219,000
Total current assets	13,985,000	15,341,000
Furniture, fixtures and equipment, net	758,000	705,000
Intangible assets, net	16,122,000	16,333,000
Deferred tax asset, net
Goodwill	57,203,000	57,203,000
Other assets	277,000	271,000
Total assets	88,345,000	89,853,000
Current liabilities:
Current portion of debt
Accrued expenses and other liabilities	1,690,000	2,556,000
Liability for option cancellations
Deferred revenue	16,174,000	18,230,000
Liabilities attributable to discontinued operations
Total current liabilities	17,864,000	20,786,000
Other long-term liabilities	537,000	588,000
Deferred tax liability, net	17,482,000	15,786,000
Total liabilities	35,883,000	37,160,000
Total stockholders' equity	52,462,000	52,693,000
Total liabilities and stockholders' equity	88,345,000	89,853,000
Discontinued Operations [Member]
Current assets:
Cash and cash equivalents
Restricted cash and investments
Accounts receivable, net
Prepaid and other assets
Total current assets
Furniture, fixtures and equipment, net
Intangible assets, net
Deferred tax asset, net
Goodwill
Other assets
Total assets
Current liabilities:
Current portion of debt
Accrued expenses and other liabilities
Liability for option cancellations
Deferred revenue
Liabilities attributable to discontinued operations	271,000	271,000
Total current liabilities	271,000	271,000
Other long-term liabilities
Deferred tax liability, net
Total liabilities	271,000	271,000
Total stockholders' equity	(271,000)	(271,000)
Total liabilities and stockholders' equity
Other [Member]
Current assets:
Cash and cash equivalents	134,000	749,000
Restricted cash and investments
Accounts receivable, net
Prepaid and other assets	930,000	1,220,000
Total current assets	1,064,000	1,969,000
Furniture, fixtures and equipment, net	29,000	33,000
Intangible assets, net
Deferred tax asset, net	8,331,000	8,557,000
Goodwill	(2,378,000)	(2,378,000)
Other assets
Total assets	7,046,000	8,181,000
Current liabilities:
Current portion of debt
Accrued expenses and other liabilities	879,000	1,346,000
Liability for option cancellations	490,000	297,000
Deferred revenue
Liabilities attributable to discontinued operations	130,000	189,000
Total current liabilities	1,499,000	1,832,000
Other long-term liabilities
Deferred tax liability, net	(17,482,000)	(15,786,000)
Total liabilities	(15,983,000)	(13,954,000)
Total stockholders' equity	23,029,000	22,135,000
Total liabilities and stockholders' equity	$ 7,046,000	$ 8,181,000