License Agreements	12 Months Ended
Dec. 31, 2011
License Agreements [Abstract]
License Agreements [Text Block]	9. License Agreements The Company has a royalty-free license from its founder, which was received in a fair market value exchange in connection with the formation of the Company, for the proprietary rights to certain hair analysis technology used by the Company in its drug testing services. The Company has two agreements to sublicense its technology, which have not generated significant royalties to date.

A contractual arrangement, generally for a defined period of time, entitling the entity to use the rights and property of another party. Examples include licensing the use of copyrighted materials and leasing the extraction of natural resources.

No definition available.

Name:	pmd_LicenseAgreementsTextBlock
Namespace Prefix:	pmd_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration