Description of Business and Basis of Presentation (Tables)

6 Months Ended

Jun. 30, 2019

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Schedule of Unaudited Pro forma Condensed Consolidated Balance Sheet

	Actual June 30, 2019			Pro Forma Adjustments			Pro Forma June 30, 2019
	(in thousands)
Assets
Total current assets	$	99,430		$	320,850		$	420,280
Total noncurrent assets		58,700			(5,307	)		53,393
Total assets	$	158,130		$	315,543		$	473,673
Liabilities, Redeemable Convertible Preferred Stock,    Convertible Preferred Stock and Stockholders’    Equity (Deficit)
Total current liabilities	$	86,846		$	—		$	86,846
Total noncurrent liabilities		10,076			(2,710	)		7,366
Total liabilities		96,922			(2,710	)		94,212
Redeemable convertible preferred stock		198,228			(198,228	)		—
Convertible preferred stock		169,102			(169,102	)		—
Stockholder’s equity (deficit)
Common stock		1			1			2
Additional paid-in capital		1,729			685,582			687,311
Accumulated other comprehensive income		5			—			5
Accumulated deficit		(307,857	)		—			(307,857	)
Total stockholders’ equity (deficit)		(306,122	)		685,583			379,461
Total liabilities, redeemable convertible preferred    stock, convertible preferred stock, and    stockholders’ equity (deficit)	$	158,130		$	315,543		$	473,673