CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Statement [Abstract]
Revenue	$ 44,248	$ 15,724	$ 83,720	$ 35,374
Cost of revenue	27,282	4,625	52,152	9,761
Gross profit	16,966	11,099	31,568	25,613
Operating expenses:
Research and development	8,876	7,652	17,709	15,346
Sales and marketing	8,360	4,883	16,502	10,880
General and administrative	8,392	5,339	16,756	10,940
Restructuring and other charges	729	187	896	688
Lease exit and related benefit	0	(129)	0	(454)
Total operating expenses	26,357	17,932	51,863	37,400
Operating loss	(9,391)	(6,833)	(20,295)	(11,787)
Other income (expenses):
Interest Expense	(43)	0	(209)	0
Interest income	40	111	117	198
Business Combination, Step Acquisition, Remeasurement Gain and Gains (Losses) From Other Preexisting Relationships	0	0	12,338	0
Other income (expenses), net	183	(42)	310	(83)
Total other income (expenses), net	180	69	12,556	115
Income (loss) before income taxes	(9,211)	(6,764)	(7,739)	(11,672)
Income tax expense	244	166	502	436
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(9,455)	(6,930)	(8,241)	(12,108)
Net Income (Loss) Attributable to Noncontrolling Interest	(253)	0		0
Net income (loss) attributable to RealNetworks	$ (9,202)	$ (6,930)	$ (7,669)	$ (12,108)
Basic net income (loss) per share (USD per share)	$ (0.24)	$ (0.18)	$ (0.20)	$ (0.32)
Diluted net income (loss) per share (USD per share)	$ (0.24)	$ (0.18)	$ (0.20)	$ (0.32)
Shares used to compute basic net income (loss) per share	37,948	37,577	37,885	37,514
Shares used to compute diluted net income (loss) per share	37,948	37,577	37,885	37,514
Comprehensive income (loss):
Unrealized investment holding gains (losses), net of reclassification adjustments	$ 0	$ 2	$ 0	$ 3
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(492)	(1,604)	(579)	(1,208)
Total other comprehensive income (loss)	(492)	(1,602)	(579)	(1,205)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(9,455)	(6,930)	(8,241)	(12,108)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	(9,947)	(8,532)	(8,820)	(13,313)
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest		0	(572)	0
Comprehensive income (loss) including noncontrolling interests	$ (9,694)	$ (8,532)	$ (8,248)	$ (13,313)