Short-term and Long-term debt (Details) - USD ($) $ in Thousands		9 Months Ended
	Mar. 02, 2022	Sep. 30, 2025	Jun. 23, 2025	Oct. 23, 2024	Jun. 06, 2024
Revolving credit facility Amendment
Short-term and long-term debt
Debt instrument, basis spread on variable rate	1.00%
Additional interest percentage	0.50%
Revolving credit facility Amendment \| SOFR
Short-term and long-term debt
Additional interest percentage	1.00%
Revolving credit facility Amendment \| Minimum \| SOFR
Short-term and long-term debt
Additional interest percentage	2.36%
Revolving credit facility Amendment \| Minimum \| Prime commercial lending rate of Wells Fargo
Short-term and long-term debt
Additional interest percentage	1.25%
Revolving credit facility Amendment \| Maximum \| SOFR
Short-term and long-term debt
Additional interest percentage	2.86%
Revolving credit facility Amendment \| Maximum \| Prime commercial lending rate of Wells Fargo
Short-term and long-term debt
Additional interest percentage	1.75%
Wells Fargo
Short-term and long-term debt
Amount outstanding, letter of credit	$ 900
Wells Fargo \| FCCR
Short-term and long-term debt
Minimum aggregate undrawn loan availability	$ 11,250
Period for FCCR covenant	12 months
Wells Fargo \| Minimum
Short-term and long-term debt
Minimum liquidity requirement	$ 5,000
Minimum amount to be derived from availability	$ 3,000
Wells Fargo \| Minimum \| FCCR
Short-term and long-term debt
Fixed charges coverage ratio	1
Wells Fargo \| Maximum \| FCCR
Short-term and long-term debt
Fixed charges coverage ratio	1
Wells Fargo \| Revolving Credit Facility \| FCCR
Short-term and long-term debt
Period for FCCR covenant	2 months
Wells Fargo \| Revolving Credit Facility \| Maximum
Short-term and long-term debt
Amount borrowed	$ 75,000
Wells Fargo \| Revolving credit facility Amendment
Short-term and long-term debt
Amount borrowed		$ 40,000
Maximum borrowing capacity	$ 75,000
Repayment of debt		$ 0
Wells Fargo \| Revolving credit facility Amendment \| Minimum
Short-term and long-term debt
Additional interest percentage	0.35%
Wells Fargo \| Revolving credit facility Amendment \| Maximum
Short-term and long-term debt
Additional interest percentage	0.75%
Wells Fargo \| Swing line loans
Short-term and long-term debt
Maximum borrowing capacity	$ 9,000
Wells Fargo \| Letters of credit
Short-term and long-term debt
Maximum borrowing capacity	2,000		$ 1,500
Wells Fargo \| First Amendment
Short-term and long-term debt
Stock repurchase amount					$ 5,000
Maximum shares repurchase amount					$ 15,000
Wells Fargo \| Second Amendment
Short-term and long-term debt
Stock repurchase amount				$ 10,000
Maximum shares repurchase amount				25,000
Maximum amount of shares repurchased				$ 5,000
Wells Fargo \| Third Amendment
Short-term and long-term debt
Maximum borrowing capacity	75,000		$ 40,000
Wells Fargo \| FILO Tranche
Short-term and long-term debt
Amount borrowed	$ 15,000

HUDSON TECHNOLOGIES INC /NY 10-Q