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Property, Equipment and Software (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property, equipment and software	$ 97,936,000	$ 94,647,000
Construction in progress	187,000	218,000
Less accumulated depreciation and amortization	(49,725,000)	(37,935,000)
Property, equipment and software, net	48,211,000	56,712,000
Property and equipment purchased but not yet paid	100,000	600,000
Depreciation expense	12,300,000	9,200,000	$ 7,000,000.0
Computer equipment
Property, Plant and Equipment [Line Items]
Property, equipment and software	2,430,000	2,360,000
Software
Property, Plant and Equipment [Line Items]
Property, equipment and software	7,513,000	7,011,000
Furniture and office equipment
Property, Plant and Equipment [Line Items]
Property, equipment and software	713,000	668,000
Motor Vehicles
Property, Plant and Equipment [Line Items]
Property, equipment and software	50,000	0
Lab equipment
Property, Plant and Equipment [Line Items]
Property, equipment and software	38,368,000	36,062,000
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, equipment and software	$ 48,675,000	$ 48,328,000

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