CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE (LOSS) INCOME - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Revenue	$ 55,066,000	$ 49,513,000
Operating costs and expenses:
Sales and marketing	7,714,000	7,841,000
Product development and content	37,671,000	31,123,000
General and administrative	5,030,000	4,928,000
Depreciation and amortization	2,820,000	3,198,000
Acquisition, restructuring and other	3,370,000	479,000
Total operating costs and expenses	56,605,000	47,569,000
(Loss) income from operations	(1,539,000)	1,944,000
Other income (expense):
Interest income	13,000	32,000
Interest expense	(396,000)	(403,000)
Loss on foreign currency transactions	(7,000)	(65,000)
Loss on disposal of assets	(108,000)	0
Other items of income, net	2,000	4,000
Total other expense	(496,000)	(432,000)
(Loss) income before income tax expense	(2,035,000)	1,512,000
Income tax expense	(373,000)	(254,000)
Net (loss) income	$ (2,408,000)	$ 1,258,000
Basic and diluted net (loss) income per share:
Basic net (loss) income per share (in dollars per share)	$ (0.03)	$ 0.02
Diluted net (loss) income per share (in dollars per share)	$ (0.03)	$ 0.02
Weighted-average shares outstanding:
Basic (in shares)	71,001,906	74,848,080
Diluted (in shares)	71,001,906	78,799,248
Comprehensive (loss) income:
Net (loss) income	$ (2,408,000)	$ 1,258,000
Other comprehensive loss:
Reclassification of gains on derivative financial instruments, net of tax of $274 and $346, respectively	(597,000)	(776,000)
Unrealized gains on derivative financial instruments, net of tax of $454 and $386, respectively	822,000	828,000
Foreign currency translation adjustment	(407,000)	(321,000)
Other comprehensive loss	(182,000)	(269,000)
Comprehensive (loss) income	$ (2,590,000)	$ 989,000