Discontinued Operation - Summary of Amounts Included in Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Operating expenses:
Net loss	$ (230)	$ (2,258)	$ (3,944)	$ (5,813)
Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues	0	1,672	970	4,915
Cost of revenues	0	128	6	294
Gross profit	0	1,544	964	4,621
Operating expenses:
Sales and marketing	0	2,266	1,712	6,591
Product development	0	44	0	124
General and administrative	69	1,412	3,413	3,412
Total operating expenses	69	3,722	5,125	10,127
Loss from operations	(69)	(2,178)	(4,161)	(5,506)
Other income (loss), net	(161)	(170)	217	(428)
Loss before income taxes	(230)	(2,348)	(3,944)	(5,934)
Income tax expense	0	(90)	0	(121)
Net loss	$ (230)	$ (2,258)	$ (3,944)	$ (5,813)

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Amount before tax of income (loss) from a discontinued operation. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

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