Note 1 - Nature of Business	12 Months Ended
Dec. 31, 2022
Notes to Financial Statements
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	1. Nature of Business *Company Overview* Psychemedics Corporation (the “Company”) provides hair testing for drugs of abuse, utilizing a patented hair analysis method involving digestion of hair, enzyme immunoassay and mass spectrometry to analyze hair to detect abused substances. The Company’s customers include Fortune 500 companies, as well as small to mid-size corporations, schools and governmental entities located in the United States and Internationally. *COVID-19 Pandemic* The outbreak of coronavirus (“COVID-19”) which was declared by the World Health Organization to be a pandemic, has, and is expected to continue to impact worldwide economic activity. COVID-19 has had a significant impact on our entire operations. Additionally, COVID-19’s effect on the overall economy has had an adverse impact on hiring, which is having a negative impact on our testing volume. The Coronavirus Aid, Relieve and Economic Security Act (“CARES”) Act, enacted on March 27, 2020, and the Families First Coronavirus Response Act, in each case modified by the Consolidated Appropriations Act enacted in December 2020, were emergency economic stimulus packages that included spending provisions and tax cuts to strengthen the United States economy and to fund a nationwide effort to curtail the effect of COVID-19. The principal impact of the CARES Act and subsequent legislation was the adoption of the Paycheck Protection Program (“PPP”). The CARES Act, together with subsequent legislation, also provided sweeping tax changes in response to the COVID-19 pandemic, including amendments to certain provisions of the previously enacted Tax Cuts and Jobs Act. The Company recognized a benefit of $2.6 million and $0.2 million for the years ended December 31, 2021, and December 31, 2020, respectively, as a reduction to cost of revenues and operating expenses related to the employee retention credit which was a tax provision in the CARES Act and subsequent legislation. Additionally, the CARES Act allowed the Company to fully carryback the 2020 net operating loss, for a refund of corporate income taxes previously paid. *Liquidity and Management’s Plans* At December 31, 2022, the Company’s principal sources of liquidity included $4.8 million of cash on hand. Management currently believes that such funds, together with future operating profits, should be adequate to fund anticipated working capital requirements, including debt obligations, and capital expenditures for at least the next 12 months. Depending upon the Company’s results of operations, its future capital needs and available marketing opportunities, the Company may use various financing sources to raise additional funds. Such sources could include but are not limited to, issuance of common stock or debt financing, lines of credit, or equipment leasing, although there is no assurance that such financings will be available to the Company on terms it deems acceptable, if at all.

Note 1 - Nature of Business

12 Months Ended

Dec. 31, 2022

Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]

1. Nature of Business

Company Overview

Psychemedics Corporation (the “Company”) provides hair testing for drugs of abuse, utilizing a patented hair analysis method involving digestion of hair, enzyme immunoassay and mass spectrometry to analyze hair to detect abused substances. The Company’s customers include Fortune 500 companies, as well as small to mid-size corporations, schools and governmental entities located in the United States and Internationally.

COVID-19 Pandemic

The outbreak of coronavirus (“COVID-19”) which was declared by the World Health Organization to be a pandemic, has, and is expected to continue to impact worldwide economic activity. COVID-19 has had a significant impact on our entire operations. Additionally, COVID-19’s effect on the overall economy has had an adverse impact on hiring, which is having a negative impact on our testing volume.

The Coronavirus Aid, Relieve and Economic Security Act (“CARES”) Act, enacted on March 27, 2020, and the Families First Coronavirus Response Act, in each case modified by the Consolidated Appropriations Act enacted in December 2020, were emergency economic stimulus packages that included spending provisions and tax cuts to strengthen the United States economy and to fund a nationwide effort to curtail the effect of COVID-19. The principal impact of the CARES Act and subsequent legislation was the adoption of the Paycheck Protection Program (“PPP”). The CARES Act, together with subsequent legislation, also provided sweeping tax changes in response to the COVID-19 pandemic, including amendments to certain provisions of the previously enacted Tax Cuts and Jobs Act. The Company recognized a benefit of $2.6 million and $0.2 million for the years ended December 31, 2021, and December 31, 2020, respectively, as a reduction to cost of revenues and operating expenses related to the employee retention credit which was a tax provision in the CARES Act and subsequent legislation. Additionally, the CARES Act allowed the Company to fully carryback the 2020 net operating loss, for a refund of corporate income taxes previously paid.

Liquidity and Management’s Plans

At December 31, 2022, the Company’s principal sources of liquidity included $4.8 million of cash on hand. Management currently believes that such funds, together with future operating profits, should be adequate to fund anticipated working capital requirements, including debt obligations, and capital expenditures for at least the next 12 months. Depending upon the Company’s results of operations, its future capital needs and available marketing opportunities, the Company may use various financing sources to raise additional funds. Such sources could include but are not limited to, issuance of common stock or debt financing, lines of credit, or equipment leasing, although there is no assurance that such financings will be available to the Company on terms it deems acceptable, if at all.