XML 54 R35.htm IDEA: XBRL DOCUMENT v3.25.0.1

Commitments and contingencies (Tables)

12 Months Ended

Dec. 31, 2024

Commitments and contingencies

Schedule of key properties utilizes leased facilities and operates equipment under non-cancelable operating leases

​

​	​	​	​	​	​
​		​	​		Lease
​	​	Annual		​	Expiration
Location	​	Rent		​	Date
Baton Rouge, Louisiana	​	$	31,000		7/2026
Champaign, Illinois	​	$	661,000		12/2027
Champaign, Illinois (2nd location)	​	$	349,000	​	9/2026
Charlotte, North Carolina	​	$	37,000		5/2025
Escondido, California	​	$	249,000		6/2027
Long Beach, California	​	$	28,800		2/2025*
Ontario, California	​	$	180,000		12/2027
Riverside, California	​	$	27,000		Month to Month
Rantoul, Illinois	​	$	36,000	​	Month to Month
Smyrna, Georgia	​	$	501,400		7/2030
Stony Point, New York	​	$	122,000		6/2026
Woodcliff Lake, New Jersey	​	$	315,000	​	8/2027

​

*Lease was renewed on March 3, 2025

X

- Definition

Tabular disclosure of Schedule of Operating Lease in annual rent.

+ References

No definition available.

+ Details

Name:	hdsn_ScheduleOfOperatingLeaseInAnnualRentTableTextBlock
Namespace Prefix:	hdsn_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration