Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2016	Aug. 01, 2016
Document And Entity Information
Entity Registrant Name	NOCOPI TECHNOLOGIES INC/MD/
Entity Central Index Key	0000888981
Document Type	10-Q
Document Period End Date	Jun. 30, 2016
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Filer Category	Smaller Reporting Company
Entity Common Stock, Shares Outstanding		58,599,016
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2016