Psychemedics Corporation (Psychemedics) provides testing services for the detection of abused substances through the analysis of hair samples. The Company's testing methods utilize a technology to perform radioimmunoassays on the hair sampled, with confirmation testing by mass spectrometry. The Company's primary application of its technology is as a testing service that analyzes hair samples for the presence of certain drugs of abuse. The Company's tests provide quantitative information that can indicate the approximate amount of drug ingested, as well as historical data, which can show a pattern of individual drug use over a period of time. This information is used by employers for both applicant and employee testing, as well as to physicians, treatment professionals, law enforcement agencies, school administrators, parents concerned about their children's drug use and other individuals or entities engaged in any business where drug use is an issue.