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Note 11 - Contingencies (Details Textual)				2 Months Ended	20 Months Ended
	Mar. 18, 2024	Jul. 05, 2022	Jun. 30, 2022	Oct. 26, 2021	Jun. 20, 2023	Jun. 20, 2023
Violations of Federal Securities Laws [Member]
Loss Contingency, New Claims Filed, Number			1	4
Shareholder Derivative Actions, Texas Court [Member]
Loss Contingency, New Claims Filed, Number					2	4
Shareholder Derivative Actions, Texas State Court Member
Loss Contingency, New Claims Filed, Number					1
Shareholder Derivative Actions, Delaware Court [Member]
Loss Contingency, New Claims Filed, Number					1
Shareholder Derivative Actions [Member]
Loss Contingency, New Claims Filed, Number	2	3

X

- Definition

The total number of new claims filed pertaining to a loss contingency during the period.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-4

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-9

+ Details

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Balance Type:	na
Period Type:	duration

X

- Details

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Namespace Prefix:
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X

- Details

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Namespace Prefix:
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Period Type:

X

- Details

Name:	srt_LitigationCaseAxis=sava_ShareholderDerivativeActionsTexasStateCourtMember
Namespace Prefix:
Data Type:	na
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Period Type:

X

- Details

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Namespace Prefix:
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X

- Details

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