Consolidated Statements of Operations (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Statement [Abstract]
Subscription revenue	$ 9,209,000	$ 8,780,000	$ 8,498,000	$ 8,234,000	$ 8,581,000	$ 7,827,000	$ 7,522,000	$ 7,298,000	$ 34,721,088	$ 31,228,644	$ 27,180,479
Cost of sales of subscription revenue									6,973,772	6,616,931	6,304,597
Gross profit									27,747,316	24,611,713	20,875,882
Operating expenses:
Sales and marketing									8,349,544	7,643,303	6,704,106
Product development									3,121,729	2,485,168	2,093,303
General and administrative expenses									11,909,462	11,793,441	11,095,425
Total operating expenses									23,380,735	21,921,912	19,892,834
Other income (expenses):
Interest and other income									9,981	51,972	77,515
Interest expense									(113,200)	(155,443)	(274,178)
Total other income (expenses)									(103,219)	(103,471)	(196,663)
Income before income taxes and discontinued operations									4,263,362	2,586,330	786,385
Income tax (benefit)	(14,751,000)				(5,427,000)				(13,670,069)	(5,427,000)	(4,075,000)
Income from continuing operations	16,304,000	705,000	522,000	402,000	6,519,000	860,000	498,000	136,000	17,933,431	8,013,330	4,861,385
(Loss) from discontinued operations, net of income tax benefit of $(230,000), $- and $-, respectively									(336,489)	(12,296,912)	(2,974,958)
Net income (loss)	$ 16,214,000	$ 649,000	$ 484,000	$ 250,000	$ 7,066,000	$ 666,000	$ 2,193,000	$ (14,209,000)	$ 17,596,942	$ (4,283,582)	$ 1,886,427
Per share amounts - basic:
Income from continuing operations	$ 1.49	$ 0.06	$ 0.05	$ 0.04	$ 0.61	$ 0.08	$ 0.05	$ 0.01	$ 1.65	$ 0.75	$ 0.46
Net income (loss)	$ 1.49	$ 0.06	$ 0.04	$ 0.02	$ 0.66	$ 0.06	$ 0.21	$ (1.34)	$ 1.62	$ (0.40)	$ 0.18
Per share amounts - diluted:
Income from continuing operations	$ 1.42	$ 0.05	$ 0.05	$ 0.04	$ 0.58	$ 0.08	$ 0.05	$ 0.01	$ 1.57	$ 0.73	$ 0.45
Net income (loss)	$ 1.41	$ 0.05	$ 0.04	$ 0.02	$ 0.63	$ 0.06	$ 0.20	$ (1.29)	$ 1.54	$ (0.39)	$ 0.17
Weighted average number of common shares outstanding:
Basic	10,909,000	10,908,000	10,892,000	10,828,000	10,728,000	10,703,000	10,686,000	10,624,000	10,884,533	10,685,333	10,569,805
Diluted	11,464,000	11,445,000	11,398,000	11,348,000	11,233,000	11,094,000	10,950,000	11,011,000	11,396,559	11,034,082	10,876,876