Adjusted level of earnings before interest tax depreciation and amortization for specified period.

No definition available.

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Namespace Prefix:	apex_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Debt instrument first required payment month and year.

+ References

No definition available.

+ Details

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Namespace Prefix:	apex_
Data Type:	xbrli:gYearMonthItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt instrument maturity month and year.

+ References

No definition available.

+ Details

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Namespace Prefix:	apex_
Data Type:	xbrli:gYearMonthItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt instrument periodic amortization payment interest.

+ References

No definition available.

+ Details

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Namespace Prefix:	apex_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Extended line of credit facility maturity.

+ References

No definition available.

+ Details

Name:	apex_ExtendedLineOfCreditFacilityMaturity
Namespace Prefix:	apex_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Interest payment in cash limit.

+ References

No definition available.

+ Details

Name:	apex_InterestPaymentInCashLimit
Namespace Prefix:	apex_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Line of credit facility maturity if milestone not met.

+ References

No definition available.

+ Details

Name:	apex_LineOfCreditFacilityMaturityIfMilestoneNotMet
Namespace Prefix:	apex_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of credit facility maturity month and year.

+ References

No definition available.

+ Details

Name:	apex_LineOfCreditFacilityMaturityMonthAndYear
Namespace Prefix:	apex_
Data Type:	xbrli:gYearMonthItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 210
-Section 45
-Paragraph 20
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 210
-Section 45
-Paragraph 21
-URI http://asc.fasb.org/extlink&oid=118262064&loc=SL116631419-115840

+ Details

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

- Definition

Description of the frequency of periodic payments (monthly, quarterly, annual).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

+ Details

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

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

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

- Definition

Description of the credit facility's borrowing capacity including discussion of how the borrowing capacity is determined (for example, borrowing capacity based on the amount of current assets).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22)(b))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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-Paragraph 1
-Subparagraph (SX 210.5-02(19)(b))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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

- Definition

Maximum amount borrowed under the credit facility at any time during the period.

+ References

No definition available.

+ Details

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

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

+ 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 (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585

+ Details

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

- Definition

The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

+ References

+ Details

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

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Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
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Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_NotesPayableToBanksMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=apex_SeniorSecuredCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=apex_TermLoanMember
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Data Type:	na
Balance Type:
Period Type:

- Details

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Balance Type:
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- Details

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Period Type:

Debt (Details) - USD ($)		1 Months Ended	3 Months Ended	6 Months Ended
Debt (Details) - USD ($)	Aug. 03, 2018	Sep. 30, 2020	May 02, 2020	Aug. 01, 2020	Sep. 01, 2020	Jan. 30, 2019
Subsequent Event
Debt
Interest payment in cash, Limit					$ 85,000
Promissory Notes to Bank
Debt
Debt instrument, interest rate, stated percentage			1.00%
Proceeds from Paycheck Protection Program loan			$ 700,000
Paycheck Protection Program loan, frequency of periodic payment			monthly
Paycheck Protection Program loan, first required repayment month and year			2020-10
Paycheck Protection Program loan, maturity month and year			2022-04
Senior Secured Credit Facility \| Subsequent Event
Debt
Adjusted level of earnings before interest tax depreciation and amortization		$ 6,500,000
Minimum cash balance					100,000
Interest payment in cash, Limit					$ 85,000
Senior Secured Credit Facility \| Term Loan
Debt
Maximum borrowing capacity	$ 40,000,000.0					$ 5,300,000
Debt instrument, interest rate, stated percentage						3.00%
Line of credit facility, borrowing capacity, description				The Company is required to maintain a borrowing base comprising the value of the Company’s trademarks that exceeds the outstanding balance of the term loans. If the borrowing base is less than the outstanding term loans at any measurement period, then the Company would be required to repay a portion of the term loans to eliminate such shortfall. Events of default include, among other things, the occurrence of a change of control of the Company, and a default under the term loans agreement would also trigger a default under the Junior Notes agreements.
Line of credit facility, maximum amount outstanding during period				$ 45,200,000
Unamortized debt issuance costs				800,000
Senior Secured Credit Facility \| Term Loan \| Subsequent Event
Debt
Extended line of credit facility maturity		Mar. 31, 2021
Line of credit facility maturity if milestone not met		Dec. 31, 2020
Senior Secured Credit Facility \| Junior Notes
Debt
Maximum borrowing capacity	$ 13,500,000
Line of credit facility maturity month and year	2021-11
Debt instrument periodic amortization payment interest	$ 0
Line of credit facility, maximum amount outstanding during period				14,400,000
Unamortized debt issuance costs				$ 200,000
Senior Secured Credit Facility \| Term Loan and Junior Notes
Debt
Debt instrument, interest rate, stated percentage				11.00%