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Summary of Significant Accounting Policies (Narrative) (Details)	3 Months Ended			6 Months Ended	12 Months Ended
	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($) item	Mar. 31, 2019	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($) item	Feb. 29, 2020 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Fair value of the financing derivative		$ 0			$ 0
Financing derivative						$ 0
Proceeds from Continuation Advances	34,000,000	$ 18,000,000.0		52,000,000.0
Deferred gain from Reverse Termination Fee	$ 98,000,000			98,000,000
Period in which company must repay continuation advances if change-of-controll transaction is entered into with third party	2 years
Equity or debt financing that must be raised in a single transaction	$ 100,000,000
Period in which company must raise equity or debt financing in a single transaction	2 years
Contingent repayment liability	$ 0			$ 0
Gain from Continuation Advances	34,000,000				$ 18,000,000.0
Fair value assets/liabilities transfer between levels	$ 0
Measurement Input, Discount Rate [Member]
Summary Of Significant Accounting Policies [Line Items]
Derivative liability, measurement input | item		0.065			0.065
Sales Revenue, Net [Member] | TOMY Digital Biology Co. [Member]
Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage	11.00%
Sales Revenue, Net [Member] | Gene Company Limited [Member]
Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage			17.00%

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