Summary of Significant Accounting Policies - Additional Information (Details)	3 Months Ended	6 Months Ended
Jun. 30, 2020 USD ($) lease	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) lease	Jun. 30, 2019 USD ($)
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 6,000	$ 24,000	$ 20,000	$ 29,000
Impairment losses	$ 0	$ 0	0	$ 0
Goodwill impairment			$ 0
Number of existing leases \| lease	3		3
Lease terms	5 years		5 years
Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life			3 years
Lease terms	12 months		12 months
Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life			13 years
Lease terms	60 months		60 months

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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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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Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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The charge against earnings resulting from the aggregate write down of tangible assets from their carrying value to their fair value.

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Lessee, Operating Leases, Number Of Existing Leases

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