Fair Value of Financial Instruments - Fair Value of Assets (Details) $ in Thousands	Sep. 30, 2021 USD ($)
Assets:
Short-term investments	$ 43,223
Investments in equity securities	7,655
Total assets	50,878
Level 1
Assets:
Short-term investments	0
Investments in equity securities	0
Total assets	0
Level 2
Assets:
Short-term investments	43,223
Investments in equity securities	0
Total assets	43,223
Level 3
Assets:
Short-term investments	0
Investments in equity securities	7,655
Total assets	$ 7,655

Short Term Investments, Fair Value Disclosure

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- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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- Definition

Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=99377092&loc=SL75136599-209740

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- Definition

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.

+ References

No definition available.

+ Details

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