Investments - Amortized Cost and Fair Value on Available-for-Sale Investments and Unrealized Gains and Losses (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Amounts Maturing in One Year or Less
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale debt securities, Amortized Cost	$ 36,766	$ 6,260
Available-for-sale debt securities, Gross Unrealized Gains		1
Available-for-sale debt securities, Gross Unrealized Losses	(25)	(1)
Available-for-sale debt securities, Fair Value	36,741	6,260
Amounts Maturing in One Year or Less \| Corporate Notes and Obligations
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale debt securities, Amortized Cost	29,866	2,245
Available-for-sale debt securities, Gross Unrealized Losses	(25)
Available-for-sale debt securities, Fair Value	29,841	2,245
Amounts Maturing in One Year or Less \| U.S. Government Treasury Securities
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale debt securities, Amortized Cost	6,900	999
Available-for-sale debt securities, Gross Unrealized Gains		1
Available-for-sale debt securities, Fair Value	6,900	1,000
Amounts Maturing in One Year or Less \| U.S. Agency Securities
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale debt securities, Amortized Cost		3,016
Available-for-sale debt securities, Gross Unrealized Losses		(1)
Available-for-sale debt securities, Fair Value		$ 3,015
Amounts Maturing in Greater than One Year
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale debt securities, Amortized Cost	38,515
Available-for-sale debt securities, Gross Unrealized Losses	(69)
Available-for-sale debt securities, Fair Value	38,446
Amounts Maturing in Greater than One Year \| Corporate Notes and Obligations
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale debt securities, Amortized Cost	4,010
Available-for-sale debt securities, Gross Unrealized Losses	(11)
Available-for-sale debt securities, Fair Value	3,999
Amounts Maturing in Greater than One Year \| U.S. Government Treasury Securities
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale debt securities, Amortized Cost	34,505
Available-for-sale debt securities, Gross Unrealized Losses	(58)
Available-for-sale debt securities, Fair Value	$ 34,447

Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale.

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

- Definition

Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale.

+ References

+ Details

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

- Definition

This item represents the cost of debt securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (aa)
-URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27161-111563

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.2)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- Definition

Amount of debt securities categorized neither as held-to-maturity nor trading.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 25
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=65884222&loc=d3e22054-111558

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=66010992&loc=d3e26610-111562

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (aa)
-URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27161-111563

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 320
-Section 50
-Paragraph 2
-Subparagraph (b)-(g)
-URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62557-112803

+ Details

Name:	us-gaap_AvailableForSaleSecuritiesDebtSecurities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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_ScheduleOfAvailableForSaleSecuritiesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_InvestmentTypeAxis=us-gaap_ShortTermInvestmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_USTreasurySecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_USTreasuryAndGovernmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InvestmentTypeAxis=apti_LongTermInvestmentsMemberMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: