XML 40 R28.htm IDEA: XBRL DOCUMENT
v3.25.3

Significant Accounting Policies - Product Sales Discounts and Allowances Continued (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Sep. 30, 2025 | Jun. 30, 2025 | Mar. 31, 2025
Disaggregation of Revenue [Line Items] |  |  |
Provision for discounts and allowances, beginning balance | $ 1,163 | $ 1,236 | $ 983
Current period | 1,175 | 749 | 642
Payments and customer credits issued | (591) | (822) | (389)
Provision for discounts and allowances, ending balance | 1,747 | 1,163 | 1,236
Chargebacks, Discounts for Prompt pay and Other allowances |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Provision for discounts and allowances, beginning balance | 282 | 366 | 276
Current period | 605 | 553 | 418
Payments and customer credits issued | (407) | (637) | (328)
Provision for discounts and allowances, ending balance | 480 | 282 | 366
Rebates, Customer Fees/Credits and Co-pay Assistance |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Provision for discounts and allowances, beginning balance | 881 | 870 | 707
Current period | 570 | 196 | 224
Payments and customer credits issued | (184) | (185) | (61)
Provision for discounts and allowances, ending balance | $ 1,267 | $ 881 | $ 870

X
- Definition Payments made against the Company's provision for product sales discounts and allowances. + References No definition available. + Details
Name: | fenc_DiscountsAndAllowancesPaymentsAndCustomerCreditsIssued
Namespace Prefix: | fenc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of expense (reversal of expense) for expected discounts and allowances on gross sales. + References No definition available. + Details
Name: | fenc_DiscountsAndAllowancesProvisionForCurrentPeriodSales
Namespace Prefix: | fenc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Provision for aggregate discounts and allowances provided to customers and offset to gross revenues earned. + References No definition available. + Details
Name: | fenc_ProvisionForDiscountsAndAllowances
Namespace Prefix: | fenc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-7 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-5 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 91 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479777/606-10-55-91 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 91 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479777/606-10-55-91 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 91 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479777/606-10-55-91 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 91 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479777/606-10-55-91 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 91 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479777/606-10-55-91 Reference 8: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 91 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479777/606-10-55-91 Reference 9: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 91 -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479777/606-10-55-91 + Details
Name: | us-gaap_DisaggregationOfRevenueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_StatementScenarioAxis=fenc_ChargebacksDiscountsForPromptPayAndOtherAllowancesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementScenarioAxis=fenc_RebatesCustomerFeesCreditsAndCoPayAssistanceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |