Nature of the Business (Details)	6 Months Ended
Jun. 30, 2020 segment campus subsidiary student
Segment Reporting Information [Line Items]
Number of students \| student	85,400
Number of subsidiaries \| subsidiary	2
Number of reportable segments \| segment	2
Hondros College of Nursing Segment
Segment Reporting Information [Line Items]
Number of campuses	6
Ohio \| Hondros College of Nursing Segment
Segment Reporting Information [Line Items]
Number of campuses	5

Number Of Campuses

No definition available.

Name:	apei_NumberOfCampuses
Namespace Prefix:	apei_
Data Type:	xbrli:integerItemType
Balance Type:	na
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- Definition

The number of students with either an academic status of Active or Program Hold and who are currently in a course or completed a course in the last 12 months; or the number of students enrolled in one or more courses after the date by which they may drop the course without financial penalty.

+ References

No definition available.

+ Details

Name:	apei_NumberOfStudents
Namespace Prefix:	apei_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of business components for which separate financial information is available, that management regularly evaluates in deciding how to allocate resources and assess performance.

+ References

No definition available.

+ Details

Name:	apei_NumberOfSubsidiaries
Namespace Prefix:	apei_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8672-108599

+ Details

Name:	us-gaap_NumberOfReportableSegments
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Data Type:	xbrli:integerItemType
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

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

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=apei_HondrosCollegeOfNursingMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

Name:	srt_StatementGeographicalAxis=stpr_OH
Namespace Prefix:
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