Summary of Significant Accounting Policies - Additional Information (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($) financialInstitution lease developmentProgram	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) financialInstitution lease developmentProgram	Sep. 30, 2019 USD ($)
Property, Plant and Equipment [Line Items]
Number of financial institutions | financialInstitution	1		1
Depreciation expense	$ 43,000	$ 9,000	$ 63,000	$ 38,000
Impairment losses	$ 0	$ 0	0	$ 0
Goodwill impairment			$ 0
Number of development programs | developmentProgram	3		3
Lease terms	5 years		5 years
Number of existing leases | lease	2		2
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