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Note 1 - Organization and Summary of Significant Accounting Policies (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 06, 2024
Restricted Cash and Cash Equivalents, Current	$ 0	$ 941,361
Cash, Uninsured Amount	4,414,510	0
Tangible Asset Impairment Charges	0	0
Goodwill, Impairment Loss	0	0
Advertising Expense	56,037	70,580
Research and Development Expense	$ 1,352,060	$ 1,418,842
Customer Relationships [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	5 years
Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)	3 years
Finite-Lived Intangible Asset, Useful Life (Year)	1 year
Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)	10 years
Finite-Lived Intangible Asset, Useful Life (Year)	10 years
LiqTech USA [Member] | LiqTech International DK [Member]
Percentage of Subsidiary Owned	100.00%
LiqTech USA [Member] | LiqTech NA [Member]
Percentage of Subsidiary Owned	100.00%
LiqTech USA [Member]
Noncontrolling Interest, Ownership Percentage by Parent	100.00%
LiqTech JiTRI [Member]
Noncontrolling Interest, Ownership Percentage by Parent			90.00%

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