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Stockholders Equity and StockBased Compensation (Details 6) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Stockholders Equity and Stock-Based Compensation
Research and development expenses	$ 0.0	$ 0.0
General and administrative expenses	0.8	0.8
Total stock-based compensation expense	$ 0.8	$ 0.8

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Amount of paid and unpaid stock dividends declared for award under share-based payment arrangement.

+ References

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- Definition

Amount of general and administrative expense classified as other.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.4)
-URI https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227

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Amount of other research and development expense.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 730
-SubTopic 10
-Section 50
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=6420194&loc=d3e21568-108373

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