Revision of Prior Period Financial Statements - Schedule of Revised Consolidated Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities
Net loss	$ (54,568)	$ (50,378)	$ (29,740)
Adjustments to reconcile net loss to net cash used in operating activities:
Provision for bad debt and contractual allowances		16,448	9,222
Stock-based compensation	26,241	16,329	9,752
Accounts receivable	28,725	21,747	12,471
Accrued liabilities	6,002	10,501	5,757
Deferred revenue	28	(15)	291
Net cash used in operating activities	(21,863)	(29,093)	(14,911)
Cash flows from investing activities
Payments to Acquire Property, Plant, and Equipment	20,457	5,180	3,562
Net cash provided by investing activities	$ (89,274)	34,142	(34,684)
Supplemental disclosures of cash flow information
Purchases of available-for-sale investments		93,133
Property, plant and equipment costs included in liabilities			110
As Reported
Cash flows from operating activities
Net loss		(48,280)	(29,420)
Adjustments to reconcile net loss to net cash used in operating activities:
Provision for bad debt and contractual allowances		15,218	9,403
Stock-based compensation			10,123
Accounts receivable		22,885	12,950
Accrued liabilities		10,776	5,364
Deferred revenue		5
Net cash used in operating activities		(29,068)
Cash flows from investing activities
Net cash provided by investing activities		34,117
Supplemental disclosures of cash flow information
Purchases of available-for-sale investments		93,158
Property, plant and equipment costs included in liabilities			35
Adjustment
Cash flows from operating activities
Net loss		(2,098)	(320)
Adjustments to reconcile net loss to net cash used in operating activities:
Provision for bad debt and contractual allowances		1,230	(181)
Stock-based compensation			(371)
Accounts receivable		(1,138)	(479)
Accrued liabilities		(275)	393
Deferred revenue		(20)
Net cash used in operating activities		(25)
Cash flows from investing activities
Net cash provided by investing activities		25
Supplemental disclosures of cash flow information
Purchases of available-for-sale investments		$ (25)
Property, plant and equipment costs included in liabilities			$ 75