Consolidated Statements of Operations - USD ($)	3 Months Ended							9 Months Ended
	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Statement [Abstract]
Subscription revenue	$ 11,537,175				$ 12,137,228			$ 35,975,597	$ 36,684,041
Cost of sales of subscription revenue	2,925,212				2,363,635			7,881,536	6,683,601
Gross profit	8,611,963				9,773,593			28,094,061	30,000,440
Operating expenses:
Sales and marketing	2,890,739				2,804,498			8,583,395	8,918,285
Product development	1,001,072				925,673			3,021,726	2,678,114
General and administrative expenses	3,933,992				3,598,697			11,555,444	10,301,919
Total operating expenses	7,825,803				7,328,868			23,160,565	21,898,318
Other income (expenses):
Interest and other income	5,214				11,300			19,380	26,894
Interest expense	(28,709)				(28,352)			(78,250)	(84,848)
Total other income (expenses)	(23,495)				(17,052)			(58,870)	(57,954)
Income before income taxes and discontinued operations	762,665				2,427,673			4,874,626	8,044,168
Income tax expense	297,000				920,000			1,864,000	2,315,000
Income from continuing operations	465,665				1,507,673			3,010,626	5,729,168
Income from discontinued operations, net of income tax expense of $-, $89,000, $- and $797,000, respectively	0				136,753			0	1,203,833
Net income	$ 465,665				$ 1,644,426			$ 3,010,626	$ 6,933,001
Per share amounts - basic:
Income from continuing operations	$ 0.04				$ 0.13			$ 0.27	$ 0.51
Net income	0.04				0.15			0.27	0.62
Per share amounts - diluted:
Income from continuing operations	0.04				0.13			0.26	0.49
Net income	$ 0.04				$ 0.14			$ 0.26	$ 0.59
Weighted average number of common shares outstanding:
Basic	11,320,904				11,236,188			11,308,833	11,218,759
Diluted	11,764,210				11,721,200			11,745,499	11,693,448
Dividends declared per common share	$ 0.17	$ 0.17	$ 0.17	$ 0.14	$ 0.14	$ 0.14	$ 0.14	$ 0.51	$ 0.42