Stock Options (Summary of Stock Options Activity) (Details) - $ / shares	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014
Options
Outstanding, beginning of year	3,560,065	4,194,972
Options granted	787,500	60,000
Exercised		(161,664)
Cancelled		(45,418)
Expired	(489,565)	(487,825)
Outstanding, end of year	3,858,000	3,560,065
Exercisable, end of year	2,851,333	2,885,051
Options available for future grant, end of year	537,008	834,943
Weighted Average Exercise Price
Outstanding, beginning of year	$ 0.24	$ 0.25
Granted	$ 0.16	0.26
Exercised		0.15
Cancelled		0.15
Expired	$ 0.34	0.32
Outstanding, end of year	0.22	0.24
Exercisable, end of year	$ 0.23	0.19
Options available for future grant, end of year		$ 0.16

Weighted average per share as of the balance sheet date of options available for future grant.

No definition available.

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Namespace Prefix:	pfti_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.