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Subsequent Events and Impact of COVID-19 Pandemic (Details)		3 Months Ended	6 Months Ended
	Jul. 01, 2020 $ / shares shares	Jun. 30, 2020 item $ / shares	Jun. 30, 2020 item $ / shares
Executive Officers
Subsequent Events and Impact of COVID-19 Pandemic
Exercise price		$ 3.13	$ 3.13
Options, term (in years)		P10Y	P10Y
Alzheimer Disease Cooperative Study
Subsequent Events and Impact of COVID-19 Pandemic
Number of patients enrolled for treatment | item		14	14
Total number of trial patients. | item		24	24
Subsequent events | Executive Officers
Subsequent Events and Impact of COVID-19 Pandemic
Options granted | shares	210,000
Exercise price	$ 4.39
Options, term (in years)	P10Y
Estimated grant date fair value	$ 2.77

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(1)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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-SubTopic 10
-Section 50
-Paragraph 2
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Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

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