Note 15 - Concentration of Risk (Details Textual) - Customer Concentration Risk [Member]	12 Months Ended
Dec. 31, 2016	Dec. 31, 2015
Accounts Receivable [Member]
Concentration Risk Threshold Percentage	10.00%	10.00%
Sales Revenue, Goods, Net [Member]
Concentration Risk Threshold Percentage	10.00%	10.00%

The concentration risk threshold percentage derived from quantitative amount.

No definition available.

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