Condensed Consolidated Balance Sheets (USD $)	Dec. 31, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 16,257,694	$ 17,842,555
Marketable securities	20,894,328	18,903,635
Accounts receivable, net of allowances of $1,723,679 and $3,242,458, respectively	19,314,789	23,286,660
Prepaid expenses and other current assets	1,912,831	1,576,213
Inventory	1,769,007	1,409,659
Deferred tax assets, net	177,798	0
Total current assets	60,326,447	63,018,722
Property and equipment, net of accumulated depreciation of $17,797,835 and $19,468,420, respectively	4,364,180	5,796,013
Long-term marketable securities	611,082	578,643
Deferred tax assets, net	217,771	235,197
Capitalized software	1,001,530	140,832
Other assets, net	2,183,973	2,238,393
Goodwill	4,150,339	4,150,339
Other intangible assets, net	191,572	387,222
Total assets	73,046,894	76,545,361
Current liabilities:
Accounts payable	2,883,844	1,455,013
Accrued expenses	17,609,766	9,109,424
Deferred revenue, net	19,450,966	16,979,455
Total current liabilities	39,944,576	27,543,892
Other long-term liabilities	2,587,327	2,507,169
Deferred revenue, net	7,698,053	6,555,437
Total liabilities	50,229,956	36,606,498
Stockholders' equity:
Preferred stock - $.001 par value, 2,000,000 shares authorized	0	0
Common stock - $.001 par value, 100,000,000 shares authorized, 54,931,397 and 54,147,234 shares issued, respectively and 46,926,162 and 46,141,999 shares outstanding, respectively	54,931	54,147
Additional paid-in capital	157,321,564	150,884,184
Accumulated deficit	(85,925,798)	(62,557,515)
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	(1,717,420)	(1,525,614)
Total stockholders' equity	22,816,938	39,938,863
Total liabilities and stockholders' equity	$ 73,046,894	$ 76,545,361