Business Combinations - Narrative (Details)					1 Months Ended		3 Months Ended				4 Months Ended	5 Months Ended	6 Months Ended	8 Months Ended	9 Months Ended		10 Months Ended
	Jun. 09, 2021 USD ($)	Apr. 27, 2021 USD ($)	Jan. 25, 2021 USD ($)	Nov. 20, 2020 USD ($)	Mar. 31, 2021 USD ($)	Feb. 28, 2021 USD ($)	Sep. 30, 2021 USD ($)	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($)	Aug. 27, 2021	Jun. 21, 2021	May 14, 2021	Mar. 26, 2021 USD ($)	Apr. 30, 2020 USD ($)
Business Acquisition [Line Items]
Net cash acquired in acquisition of businesses															$ 4,263,000	$ 0
Percentage of ongoing operations of the combined entity	75.00%
Reverse recapitalization, goodwill recognized	$ 0
Reverse recapitalization, intangibles recognized	$ 0
Exchange ratio	10.28
Acquisition-related expenses							$ 1,227,000			$ 0					$ 36,566,000	$ 0
Paycheck Protection Program loans | Medium-term Notes | Paycheck Protection Program, CARES Act | Thrasys
Business Acquisition [Line Items]
Principle amount																						$ 500,000
Paycheck Protection Program loans | Medium-term Notes | Paycheck Protection Program, CARES Act | BHS
Business Acquisition [Line Items]
Principle amount																						1,000,000
Paycheck Protection Program loans | Medium-term Notes | Paycheck Protection Program, CARES Act | TTC
Business Acquisition [Line Items]
Principle amount																						$ 1,900,000
Debt forgiven					$ 300,000	$ 900,000			$ 700,000
Thrasys
Business Acquisition [Line Items]
Acquisition percentage				100.00%
Consideration paid, net of cash and restricted cash				$ 167,400,000
Net cash acquired in acquisition of businesses				2,500,000
Escrow deposit				$ 10,000,000
Escrow period (in months)				12 months
Goodwill tax deductible amount				$ 0
Increase (decrease) in net assets acquired and goodwill								$ (2,500,000)									$ (2,521,000)
Liability related to redeemable preferred shares																	(531,000)
Deferred rent liability																	(531,000)
BHS
Business Acquisition [Line Items]
Acquisition percentage				100.00%
Consideration paid, net of cash and restricted cash				$ 15,800,000
Net cash acquired in acquisition of businesses				1,000,000
Goodwill tax deductible amount				0
Increase (decrease) in net assets acquired and goodwill								(200,000)									(183,000)
Accrual for amounts owed to providers								400,000									421,000
Liability related to redeemable preferred shares																	(1,005,000)
Deferred rent liability																	$ (584,000)
TTC
Business Acquisition [Line Items]
Acquisition percentage			100.00%
Consideration paid, net of cash and restricted cash			$ 45,900,000
Net cash acquired in acquisition of businesses			2,400,000
Goodwill tax deductible amount			$ 0
Increase (decrease) in net assets acquired and goodwill														$ (1,177,000)
Accrual for amounts owed to related party								2,800,000						2,807,000
Liability related to redeemable preferred shares														(1,283,000)
Deferred rent liability														$ 1,524,000
Glocal
Business Acquisition [Line Items]
Acquisition percentage																		2.61%	1.80%	1.00%	45.94%
Consideration paid, net of cash and restricted cash				131,500,000
Net cash acquired in acquisition of businesses				$ 400,000
Goodwill tax deductible amount																					$ 0
Increase (decrease) in net assets acquired and goodwill								(5,800,000)					$ (5,848,000)
Equity interest in acquiree, percentage				43.46%
Step acquisition, ownership percentage after transaction							94.81%				94.81%	94.81%	94.81%	94.81%	94.81%		94.81%				89.40%
Deferred tax liability								$ 9,900,000					$ 9,890,000
Reserve against accounts receivable							$ 2,000,000						2,000,000
Liability related to redeemable preferred shares							12,000,000						$ 11,959,000
Innovations Group
Business Acquisition [Line Items]
Acquisition percentage		100.00%
Consideration paid, net of cash and restricted cash		$ 169,800,000
Net cash acquired in acquisition of businesses		600,000
Goodwill tax deductible amount		$ 0
Increase (decrease) in net assets acquired and goodwill												$ 0
Noncontrolling interests							500,000					$ 534,000
Cloudbreak
Business Acquisition [Line Items]
Consideration paid, net of cash and restricted cash	$ 142,000,000
Net cash acquired in acquisition of businesses	900,000
Goodwill tax deductible amount	$ 0
Increase (decrease) in net assets acquired and goodwill							13,000				$ 13,000
Accrual for amounts owed to providers											82,000
Deferred rent liability							$ 400,000				$ 382,000