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Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Amount of assets pledged to secure a debt instrument.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of transfer of financial instrument classified as an asset into (out of) level 3 of the fair value hierarchy.

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Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

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Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2022	Dec. 31, 2021	Apr. 30, 2022
Fair value
Unrealized Losses	$ (28)
Transfers between Level 2 and Level 3	0	$ 0
R-Bridge Financing \| Royalty Based Loan Agreement
Fair value
Amount placed in interest reserve account			$ 2,000
Adjusted cost
Fair value
Cash	17,584	9,459
Total	42,978	68,234
Fair Value
Fair value
Cash	17,584	9,459
Total	42,950	68,234
Chesterbrook, Pennsylvania
Fair value
Letter of credit collateral	500
Cash and Cash Equivalents \| Fair Value
Fair value
Cash	15,027	8,148
Total	22,431	66,923
Restricted Cash \| Fair Value
Fair value
Cash	2,557	1,311
Total	2,557	1,311
Marketable Securities \| Fair Value
Fair value
Total	17,961
Level 1
Fair value
Unrealized Losses	(28)
Level 1 \| Adjusted cost
Fair value
Investments	25,394	58,775
Level 1 \| Fair Value
Fair value
Investments	25,366	58,775
Level 1 \| Money market mutual funds \| Adjusted cost
Fair value
Investments	3,424	58,775
Level 1 \| Money market mutual funds \| Fair Value
Fair value
Investments	3,424	58,775
Level 1 \| U.S. treasury securities
Fair value
Unrealized Losses	(28)
Level 1 \| U.S. treasury securities \| Adjusted cost
Fair value
Investments	21,970
Level 1 \| U.S. treasury securities \| Fair Value
Fair value
Investments	21,942
Level 1 \| Cash and Cash Equivalents \| Fair Value
Fair value
Investments	7,404	58,775
Level 1 \| Cash and Cash Equivalents \| Money market mutual funds \| Fair Value
Fair value
Investments	3,424	$ 58,775
Level 1 \| Cash and Cash Equivalents \| U.S. treasury securities \| Fair Value
Fair value
Investments	3,980
Level 1 \| Marketable Securities \| Fair Value
Fair value
Investments	17,961
Level 1 \| Marketable Securities \| U.S. treasury securities \| Fair Value
Fair value
Investments	$ 17,961