XML 36 R22.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Trade accounts receivable - net (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2023
Trade accounts receivable - net |
Schedule of changes in the balance of accounts receivable | The opening and closing balance of the company’s accounts receivable is as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Beginning | ​ | Increase | ​ | ​ | ​
​ | ​ | Balance | ​ | (Decrease), | ​ | Ending Balance
(in thousands) |  | at January 1 |  | Net |  | at December 31
2023 | ​ | $ | 20,872 | ​ | $ | 4,297 | ​ | $ | 25,169
2022 | ​ | $ | 14,223 | ​ | $ | 6,649 | ​ | $ | 20,872
Schedule of activity occurring in the reserves for allowance for credit losses | The following table represents the activity occurring in the reserves for allowance for credit losses in 2023 and 2022. ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Beginning | ​ | Net additions | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Balance | ​ | charged to | ​ | Deductions | ​ | Ending Balance
(in thousands) |  | at January 1 |  | Operations |  | and Other |  | at December 31
2023 | ​ | $ | 1,927 | ​ | $ | 659 | ​ | $ | (592) | ​ | $ | 1,994
2022 | ​ | $ | 1,584 | ​ | $ | 474 | ​ | $ | (131) | ​ | $ | 1,927
​

X
- Definition Tabular disclosure of the changes in the balance of accounts receivable during the year. + References No definition available. + Details
Name: | hdsn_ScheduleOfChangesInAccountsReceivableTableTextBlock
Namespace Prefix: | hdsn_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_ReceivablesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3,4) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration