Goodwill and Intangible Assets - Goodwill Reconciliation (Details) - USD ($)	3 Months Ended	12 Months Ended
Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 43,569,000	$ 27,638,000	$ 27,638,000
Addition in connection with the acquisition of HALO	0		15,931,000
Impairment of goodwill	(18,649,000)	$ 0
Goodwill, ending balance	$ 24,920,000		$ 43,569,000

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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