Revision of Prior Period Financial Statements - Schedule of Revised Consolidated Statements of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities
Net loss	$ (9,065)	$ (8,250)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation	305	4,856
Provision for doubtful accounts and contractual allowances	9,184	5,411
Accounts receivable	9,989	12,392
Prepaid expenses and other current assets	(114)	29
Accrued liabilities	(9,467)	(6,061)
Deferred revenue	(136)	39
Net cash used in operating activities	(22,366)	(17,163)
Cash flows from investing activities
Purchases of property and equipment	(3,405)	(1,705)
Net cash provided by investing activities	59,911	26,379
Net increase in cash and cash equivalents	36,052	8,078
Cash and cash equivalents end of period	$ 56,514	28,101
As Reported
Cash flows from operating activities
Net loss		(8,019)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation		4,415
Provision for doubtful accounts and contractual allowances		4,709
Accounts receivable		10,984
Prepaid expenses and other current assets		169
Accrued liabilities		(6,380)
Deferred revenue		66
Net cash used in operating activities		(17,099)
Cash flows from investing activities
Purchases of property and equipment		(1,635)
Net cash provided by investing activities		26,449
Net increase in cash and cash equivalents		8,212
Cash and cash equivalents end of period		28,235
Adjustment
Cash flows from operating activities
Net loss		(231)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation		441
Provision for doubtful accounts and contractual allowances		702
Accounts receivable		1,408
Prepaid expenses and other current assets		(140)
Accrued liabilities		319
Deferred revenue		(27)
Net cash used in operating activities		(64)
Cash flows from investing activities
Purchases of property and equipment		(70)
Net cash provided by investing activities		(70)
Net increase in cash and cash equivalents		(134)
Cash and cash equivalents end of period		$ (134)