Cover - USD ($)	12 Months Ended
	Dec. 31, 2023	Mar. 28, 2024	Jun. 30, 2023
Cover [Abstract]
Document Type	10-K
Amendment Flag	false
Document Annual Report	true
Document Transition Report	false
Document Period End Date	Dec. 31, 2023
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2023
Current Fiscal Year End Date	--12-31
Entity File Number	000-22333
Entity Registrant Name	NANOPHASE TECHNOLOGIES CORPORATION
Entity Central Index Key	0000883107
Entity Tax Identification Number	36-3687863
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	1319 Marquette Drive
Entity Address, City or Town	Romeoville
Entity Address, State or Province	IL
Entity Address, Postal Zip Code	60446
City Area Code	(630)
Local Phone Number	771-6708
Title of 12(b) Security	Common Stock, par value $.01 per share
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 23,412,675
Entity Common Stock, Shares Outstanding		54,801,834
Document Financial Statement Error Correction [Flag]	false
Auditor Firm ID	49
Auditor Name	RSM US LLP
Auditor Location	Milwaukee, Wisconsin