CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)	Jun. 30, 2011	Dec. 31, 2010
ASSETS
Cash and cash equivalents (Note 2)	$ 31,101,781	$ 20,089,660
Marketable securities (Note 2)	25,179,961	26,502,945
Accounts receivable, net of allowance for doubtful accounts of $265,308 as of June 30, 2011 and $238,228 as of December 31, 2010	5,992,325	6,623,261
Other receivables, net	390,094	663,968
Prepaid expenses and other current assets	2,003,072	1,785,007
Total current assets	64,667,233	55,664,841
Property and equipment, net of accumulated depreciation and amortization of $15,182,252 as of June 30, 2011 and $12,845,359 as of December 31, 2010	9,531,028	10,887,732
Marketable securities (Note 2)	19,423,215	30,302,428
Other assets	211,663	243,611
Goodwill	24,057,616	24,057,616
Other intangibles, net	5,945,820	6,725,462
Restricted cash (Note 2)	1,660,370	1,660,370
Total assets	125,496,945	129,542,060
LIABILITIES AND STOCKHOLDERS’ EQUITY
Accounts payable	1,989,671	2,455,894
Accrued expenses	5,776,037	8,239,064
Deferred revenue	20,162,444	17,431,381
Other current liabilities	335,187	184,328
Liabilities of discontinued operations	46	1,871
Total current liabilities	28,263,385	28,312,538
Deferred tax liability	288,000	288,000
Other liabilities	4,277,091	2,948,181
Total liabilities	32,828,476	31,548,719
Stockholders’ Equity
Preferred stock; $0.01 par value; 10,000,000 shares authorized; 5,500 issued and outstanding as of June 30, 2011 and December 31, 2010; the aggregate liquidation preference totals $55,000,000 as of June 30, 2011 and December 31, 2010	55	55
Common stock; $0.01 par value; 100,000,000 shares authorized; 38,176,541 shares issued and 31,956,063 shares outstanding as of June 30, 2011, and 37,775,381 shares issued and 31,667,600 shares outstanding as of December 31, 2010	381,765	377,754
Additional paid-in capital	270,148,459	270,644,658
Accumulated other comprehensive income	115,416	331,311
Treasury stock at cost; 6,220,478 shares as of June 30, 2011 and 6,107,781 shares as of December 31, 2010	(10,800,371)	(10,478,838)
Accumulated deficit	(167,176,855)	(162,881,599)
Total stockholders’ equity	92,668,469	97,993,341
Total liabilities and stockholders’ equity	$ 125,496,945	$ 129,542,060