CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash Flows from Operating Activities:
Net loss	$ (1,742,684)	$ (4,436,778)
Stock-based compensation expense	420,522	532,908
Provision for doubtful accounts	(25,761)	65,769
Depreciation and amortization	943,056	1,287,262
Restructuring and other charges	393,195	847,980
Deferred rent	(80,633)	(79,989)
Noncash barter activity	0	48,183
Gain on disposition of assets	(56,586)	0
Changes in operating assets and liabilities:
Accounts receivable	720,575	521,152
Other receivables, net	367,768	84,845
Prepaid expenses and other current assets	179,754	(544,764)
Other assets	(11,881)	28,186
Accounts payable	(1,373,427)	39,265
Accrued expenses	(1,169,674)	(1,386,689)
Deferred revenue	1,419,780	507,501
Other current liabilities	(24,657)	75,207
Net cash used in operating activities	(40,653)	(2,409,962)
Cash Flows from Investing Activities:
Purchase of marketable securities	0	(35,700,010)
Sale and maturity of marketable securities	6,278,012	14,485,094
Capital expenditures	(196,721)	(486,657)
Proceeds from the disposition of assets	56,586	0
Net cash provided by (used in) investing activities	6,137,877	(21,701,573)
Cash Flows from Financing Activities:
Cash dividends paid on common stock	0	(802,601)
Cash dividends paid on preferred stock	0	(96,424)
Proceeds from the sale of common stock	0	135,000
Purchase of treasury stock	(125,067)	(733,501)
Net cash used in financing activities	(125,067)	(1,497,526)
Net increase (decrease) in cash and cash equivalents	5,972,157	(25,609,061)
Cash and cash equivalents, beginning of period	23,845,360	44,865,191
Cash and cash equivalents, end of period	29,817,517	19,256,130
Cash payments made for interest	0	0
Cash payments made for income taxes	$ 0	$ 0