Name:	phat_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsIssuanceOfUnvestedRestrictedStockAwards
Namespace Prefix:	phat_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Share-based compensation arrangement by share-based payment award, equity instruments other than options, sale of unvested common stock.

No definition available.

Name:	phat_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsSaleOfUnvestedCommonStock
Namespace Prefix:	phat_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Share-based compensation arrangement by share-based payment award, equity instruments other than options, share vesting.

No definition available.

Name:	phat_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsShareVesting
Namespace Prefix:	phat_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Share-based compensation arrangement by share-based payment award, equity instruments other than options, vesting restrictions placed on previously issued shares.

No definition available.

Name:	phat_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestingRestrictionsPlacedOnPreviouslyIssuedShares
Namespace Prefix:	phat_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

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

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901