Net Income (Loss) Per Share Reconciliations of Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended					9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Net income (loss) per share numerator:
Net loss from continuing operations	$ (11,026)		$ (16,380)			$ (68,221)	$ (52,175)
Net loss attributable to noncontrolling interests	(42)		0			(42)	0
Net loss from continuing operations attributable to NantHealth	(10,984)		(16,380)			(68,179)	(52,175)
Net (loss) income from discontinued operations attributable to NantHealth	(16)		3			31,955	1,162
Net loss attributable to NantHealth for basic and diluted net loss per share	$ (11,000)	$ (48,289)	$ (16,377)	$ (14,713)	$ (19,923)	$ (36,224)	$ (51,013)	[1]
Weighted Average Number of Shares
Weighted-average shares for basic net income (loss) per share (in shares)	110,929,357		110,619,905			110,859,611	110,261,279
Effect of dilutive securities (in shares)	0		0			0	0
Weighted-average shares for dilutive net income (loss) per share (in shares)	110,929,357		110,619,905			110,859,611	110,261,279
Basic and diluted net income (loss) per share attributable to NantHealth:
Continuing operations - common stock (in dollars per share)	$ (0.10)		$ (0.15)			$ (0.62)	$ (0.47)
Discontinued operations - common stock (in dollars per share)	0		0			0.29	0.01
Total net income (loss) per share - common stock (in dollars per share)	$ (0.10)		$ (0.15)			$ (0.33)	$ (0.46)

[1] The statements for the nine months ended September 30, 2020 and 2019 include the Connected Care Business (see Note 4).