CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)	Jun. 30, 2012	Dec. 31, 2011
ASSETS
Cash and cash equivalents (Note 2)	$ 20,535,644	$ 44,865,191
Marketable securities (Note 2)	20,182,450	20,895,238
Accounts receivable, net of allowance for doubtful accounts of $140,027 as of June 30, 2012 and $158,870 as of December 31, 2011	4,732,132	6,225,424
Other receivables, net	824,280	356,219
Prepaid expenses and other current assets	1,791,938	1,421,955
Restricted cash	660,370	660,370
Total current assets	48,726,814	74,424,397
Property and equipment, net of accumulated depreciation and amortization of $15,036,740 as of June 30, 2012 and $13,466,365 as of December 31, 2011	6,666,870	8,494,648
Marketable securities (Note 2)	26,644,072	7,894,365
Other assets	125,312	172,055
Goodwill	24,057,616	24,057,616
Other intangibles, net of accumulated amortization of $5,852,290 as of June 30, 2012 and $5,529,730 as of December 31, 2011	4,509,575	5,370,135
Restricted cash (Note 2)	1,000,000	1,000,000
Total assets	111,730,259	121,413,216
LIABILITIES AND STOCKHOLDERS’ EQUITY
Accounts payable	2,403,355	2,305,589
Accrued expenses	5,489,694	7,970,802
Deferred revenue	18,306,929	17,625,666
Other current liabilities	537,723	509,214
Total current liabilities	26,737,701	28,411,271
Deferred tax liability	288,000	288,000
Other liabilities	3,922,943	4,569,497
Total liabilities	30,948,644	33,268,768
Stockholders’ Equity
Preferred stock; $0.01 par value; 10,000,000 shares authorized; 5,500 issued and outstanding as of June 30, 2012 and December 31, 2011; the aggregate liquidation preference totals $55,000,000 as of June 30, 2012 and December 31, 2011	55	55
Common stock; $0.01 par value; 100,000,000 shares authorized; 39,441,933 shares issued and 32,755,904 shares outstanding as of June 30, 2012, and 38,461,595 shares issued and 32,131,188 shares outstanding as of December 31, 2011	394,419	384,616
Additional paid-in capital	269,809,193	270,230,246
Accumulated other comprehensive income	(293,820)	(394,600)
Treasury stock at cost; 6,686,029 shares as of June 30, 2012 and 6,330,407 shares as of December 31, 2011	(11,750,434)	(11,010,149)
Accumulated deficit	(177,377,798)	(171,065,720)
Total stockholders’ equity	80,781,615	88,144,448
Total liabilities and stockholders’ equity	$ 111,730,259	$ 121,413,216