Common Stock - Sales Agreement (Detail) $ in Thousands	1 Months Ended	3 Months Ended	6 Months Ended
Feb. 29, 2020 USD ($) item	Jun. 30, 2021 USD ($) shares	Jun. 30, 2021 USD ($) shares
Class of Stock [Line Items]
Total shares of common stock sold \| shares		4,066,773	5,915,210
Gross proceeds		$ 7,267	$ 9,972
Commissions earned by placement agents		(291)	(400)
Issuance fees		(30)	(47)
Net proceeds		$ 6,946	$ 9,525
Sale Agreement (ATM)
Class of Stock [Line Items]
Number of agents \| item	2
Maximum aggregate offering price of equity securities	$ 50,000
Percentage of commission	4.00%
Sales Agreement Agent [Member] \| Sale Agreement (ATM)
Class of Stock [Line Items]
Percentage of commission	2.00%

Represents the amount of commission expenses.

No definition available.

Name:	ampe_CommissionExpenses
Namespace Prefix:	ampe_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Commissions as Percentage of Gross Offering Proceeds

+ References

No definition available.

+ Details

Name:	ampe_CommissionsAsPercentageOfGrossOfferingProceeds
Namespace Prefix:	ampe_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Issuance Subsequent Recurring Fees

+ References

No definition available.

+ Details

Name:	ampe_IssuanceSubsequentRecurringFees
Namespace Prefix:	ampe_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Maximum aggregate offering price of equity securities.

+ References

No definition available.

+ Details

Name:	ampe_MaximumAggregateOfferingPriceOfEquitySecurities
Namespace Prefix:	ampe_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Number of agents.

+ References

No definition available.

+ Details

Name:	ampe_NumberOfAgents
Namespace Prefix:	ampe_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash inflow from issuance of common in connection with equity distribution agreement.

+ References

No definition available.

+ Details

Name:	ampe_ProceedsFromIssuanceOfCommonStockEquityDistributionAgreement
Namespace Prefix:	ampe_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Number of stock issued under equity distribution agreement during the period.

+ References

No definition available.

+ Details

Name:	ampe_StockIssuedDuringPeriodSharesWithEquityDistributionAgreement
Namespace Prefix:	ampe_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- 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

Name:	us-gaap_ClassOfStockLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3255-108585

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=ampe_AtMarketEquityProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_TitleOfIndividualAxis=ampe_SalesAgreementAgentMember
Namespace Prefix:
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Balance Type:
Period Type: