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Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2019	May 15, 2019
Document And Entity Information [Abstract]
Entity Registrant Name	NANOPHASE TECHNOLOGIES Corp
Entity Central Index Key	0000883107
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2019
Trading Symbol	NANX
Current Fiscal Year End Date	--12-31
Entity Reporting Status Current	Yes
Entity Small Business	true
Entity Filer Category	Non-accelerated Filer
Entity Emerging Growth	false
Entity Common Stock, Shares Outstanding		38,000,792
Document Fiscal Period Focus	Q1
Document Fiscal Year Focus	2019

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Document And Entity Information [Abstract]

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