Note 13 - Employee Benefit Plans (Details Textual) - USD ($)	12 Months Ended
Dec. 31, 2016	Dec. 31, 2015
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent	12.00%
Defined Contribution Plan Employers Matching Contribution Vesting Period	5 years
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 39,000	$ 37,000
Accrued Bonuses, Current	$ 904,000	$ 727,000
President [Member]
Bonus Percentage	5.00%
Accrued Bonuses, Current	$ 232,000
Chief Executive Officer [Member]
Bonus Percentage	5.00%
Accrued Bonuses, Current	$ 146,000
Former CEO [Member]
Percentage Of Bonus Upon Retirement	75.00%
For Employees Contributing 1 Percent of Gross Earnings [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	0.50%
For Employees Contributing 2 to12 Percent of Gross Earnings [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	1.00%

The bonus paid to the CEO and President in percentage of the Company's pre-tax profits.

No definition available.

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Namespace Prefix:	apt_
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Balance Type:	na
Period Type:	duration

- Definition

Defined Contribution Plan Employers Matching Contribution Vesting Period

+ References

No definition available.

+ Details

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Namespace Prefix:	apt_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Rate for retirement bonus.

+ References

No definition available.

+ Details

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Namespace Prefix:	apt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Carrying value as of the balance sheet date of obligations incurred and payable for incentive compensation awarded to employees and directors or earned by them based on the terms of one or more relevant arrangements. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Current Liabilities
-URI http://asc.fasb.org/extlink&oid=6509677

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section 45
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6911-107765

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.20)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section 45
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6935-107765

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Amount of discretionary contributions made by an employer to a defined contribution plan.

+ References

No definition available.

+ Details

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

- Definition

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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- Definition

Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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- Details

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- Details

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- Details

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- Details

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- Details

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