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Specific incremental costs directly attributable to a proposed or actual offering of securities which are deferred at the end of the reporting period.

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Present value of lessee's discounted obligation for lease payments from operating lease.

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Amount of lessee's right to use underlying asset under operating lease.

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Summary of Significant Accounting Policies, Deferred Offering Costs and Recent Accounting Pronouncements (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred Offering Costs [Abstract]
Deferred offering costs	$ 149
ASU 2016-02 [Member]
Recent Accounting Pronouncements [Abstract]
Lease liabilities	4,000
ROU assets	$ 4,000
ASU 2014-09 and ASU 2018-07 [Member]
Recent Accounting Pronouncements [Abstract]
Cumulative effect adjustment of accumulated deficit		$ (2,832)
Adjustments Due to Adoption of ASU 2014-09 [Member] \| ASU 2014-09 [Member]
Recent Accounting Pronouncements [Abstract]
Deferred revenue		3,100
Adjustments Due to Adoption of ASU 2014-09 [Member] \| ASU 2014-09 [Member] \| Co-Development and Research Fees [Member]
Recent Accounting Pronouncements [Abstract]
Deferred revenue		(268)
Additional Paid-in Capital [Member] \| ASU 2014-09 and ASU 2018-07 [Member]
Recent Accounting Pronouncements [Abstract]
Cumulative effect adjustment of accumulated deficit		$ 20