CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)	Mar. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 17,608,564	$ 18,651,468
Restricted cash	750,000	750,000
Marketable securities	9,805,890	10,530,942
Accounts receivable, net of allowances of $397,797 and $940,101, respectively	10,298,428	14,130,302
Prepaid expenses and other current assets	2,811,530	2,796,665
Inventory	1,068,177	642,819
Deferred tax assets, net	425,985	464,031
Total current assets	42,768,574	47,966,227
Property and equipment, net of accumulated depreciation of $16,656,470 and $16,131,570, respectively	3,945,243	3,980,679
Deferred tax assets, net	86,465	86,465
Software development costs, net	1,079,760	1,161,822
Other assets, net	2,160,826	2,185,148
Goodwill	4,150,339	4,150,339
Other intangible assets, net	159,394	174,426
Total assets	54,350,601	59,705,106
Current liabilities:
Accounts payable	3,184,490	2,801,372
Accrued expenses	14,114,587	16,720,582
Deferred revenue, net	17,940,235	17,831,653
Total current liabilities	35,239,312	37,353,607
Other long-term liabilities	2,654,916	2,618,818
Deferred tax liabilities, net	171,682	167,875
Deferred revenue, net	5,789,983	6,311,865
Total liabilities	43,855,893	46,452,165
Commitments and contingencies
Stockholders' equity:
Preferred stock - $.001 par value, 2,000,000 shares authorized	0	0
Common stock - $.001 par value, 100,000,000 shares authorized, 55,974,542 and 55,615,972 shares issued, respectively and 47,969,307 and 47,610,737 shares outstanding, respectively	55,975	55,616
Additional paid-in capital	164,261,710	162,673,833
Accumulated deficit	(105,290,564)	(100,910,119)
Common stock held in treasury, at cost (8,005,235 and 8,005,235 shares, respectively)	(46,916,339)	(46,916,339)
Accumulated other comprehensive loss, net	(1,616,074)	(1,650,050)
Total stockholders' equity	10,494,708	13,252,941
Total liabilities and stockholders' equity	$ 54,350,601	$ 59,705,106