| Cover | 12 Months Ended |
| Dec. 31, 2022 | |
| Cover [Abstract] | |
| Document Type | DEF 14A |
| Entity Registrant Name | AVANTAX, INC. |
| Entity Central Index Key | 0001068875 |
| Amendment Flag | false |
| Pay vs Performance Disclosure - USD ($) | 12 Months Ended | ||||
| Jan. 10, 2020 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | ||
| Pay vs Performance Disclosure [Table] | |||||
| Pay vs Performance [Table Text Block] | Year Total Compensation per SCT for Current CEO CAP for Current CEO (1) Total Compensation per SCT for Former CEO (2) CAP for Former CEO (1) (2) Average Total Compensation per SCT for Other NEOs (3) Average CAP for Other NEOs (1) (3) Value of Initial Fixed $100 Investment Based on: (4) Company Adjusted EBITDA (as adjusted) (6) Company Cumulative TSR Peer Group Cumulative TSR (5) Net Income 2022 $7,914,813 $15,443,346 N/A N/A $2,235,972 $2,543,299 $97.67 $87.59 $420,247,000 $169,365,635 2021 $7,259,787 $8,015,674 N/A N/A $1,844,990 $1,989,641 $66.26 $126.80 $7,757,000 $132,496,414 2020 $8,018,388 $6,085,443 $5,659,267 $(1,780,923) $1,393,465 $774,585 $60.86 $113.76 $(342,755,000) $127,266,395 (1) CAP is calculated in accordance with SEC rules. The valuation methods, including selection of underlying assumptions, to estimate the fair values of equity awards included within the table above are consistent with those discussed within our most recent Annual Report on Form 10-K. Assumptions included within our updated estimates of fair value have been adjusted to reflect the passage of time since the original grant date. However, these assumptions were materially consistent with those originally disclosed in the Annual Report on Form 10-K for the year corresponding with the original grant date. Changes to the original assumptions for each award primarily relate to changes in our share price, risk-free interest rates and the expected life of options. See the section “ Reconciliation to CAP ” for a reconciliation between Total Compensation per SCT and CAP. (2) Mr. John Clendening (3) Other NEOs for 2022 and 2021 were Ms. Bruder Messrs. Mehlman Mackay Campbell Mses. Bruder Carsley Murray Messrs. Athwal Campbell Mackay Mehlman (4) Cumulative TSR calculated in the same manner as for the stock performance graph under Item 201(e) of Regulation S-K. (5) Peer Group Cumulative TSR calculated using NASDAQ Other Finance Index. (6) Company Selected Measure shown is Company Adjusted EBITDA (as adjusted), as used for the Company’s 2022 Short-Term Executive Bonus Program. Financial Performance Measures The most important financial performance measures the Company utilized in 2022 are: ● Company Adjusted EBITDA ● Company Revenue ● Relative TSR Reconciliation to CAP The following tables reconcile how CAP is calculated, compared to Total Compensation per the Summary Compensation Table. Executive Current CEO Former CEO Fiscal Year 2022 2021 2020 2020 Total Compensation per SCT $ 7,914,813 $ 7,259,787 $ 8,018,388 $ 5,659,267 Subtract: Grant date fair value of equity awards granted in covered fiscal year $(5,567,034) $ (4,943,227) $ (6,035,272) ─ Add: Fair value at year-end of equity awards granted in covered fiscal year $ 8,749,581 $ 5,679,870 $ 4,161,271 ─ Add/Subtract: Change in fair value from end of prior fiscal year to end of covered fiscal year for unvested equity awards granted prior to covered fiscal year $ 4,461,951 $ (53,696) ─ ─ Add/Subtract: Change in fair value from end of prior fiscal year to vesting date for equity awards that vested in covered fiscal year $ (115,965) $ 72,940 $ (58,944) $ (46,976) Subtract: Fair Value at end of prior fiscal year for equity awards forfeited in covered fiscal year ─ ─ ─ $(7,393,214) CAP $ 15,443,346 $ 8,015,674 $ 6,085,443 $(1,780,923) Executive Average Other NEOs Year 2022 2021 2020 Total Compensation per SCT $ 2,235,972 $ 1,844,990 $ 1,393,465 Deduct: Grant date fair value of equity awards granted in covered fiscal year $ (1,363,471) $ (921,231) $ (753,904) Add: Fair value at year-end of equity awards granted in covered fiscal year $ 1,219,331 $ 1,058,796 $ 677,039 Add/Deduct: Change in fair value from end of prior fiscal year to end of covered fiscal year for unvested equity awards granted prior to covered fiscal year $ 618,383 $ 27,191 $ (187,128) Add/Deduct: Change in fair value from end of prior fiscal year to vesting date for equity awards that vested in covered fiscal year $ 239,994 $ (2,497) $ (85,894) Deduct: Fair Value at end of prior fiscal year for equity awards forfeited in covered fiscal year $ (406,910) $ (17,608) $ (268,993) CAP $ 2,543,299 $ 1,989,641 $ 774,585 Relationship between Executive Compensation and Financial Performance | ||||
| Adjustment To PEO Compensation, Footnote [Text Block] | The following tables reconcile how CAP is calculated, compared to Total Compensation per the Summary Compensation Table. Executive Current CEO Former CEO Fiscal Year 2022 2021 2020 2020 Total Compensation per SCT $ 7,914,813 $ 7,259,787 $ 8,018,388 $ 5,659,267 Subtract: Grant date fair value of equity awards granted in covered fiscal year $(5,567,034) $ (4,943,227) $ (6,035,272) ─ Add: Fair value at year-end of equity awards granted in covered fiscal year $ 8,749,581 $ 5,679,870 $ 4,161,271 ─ Add/Subtract: Change in fair value from end of prior fiscal year to end of covered fiscal year for unvested equity awards granted prior to covered fiscal year $ 4,461,951 $ (53,696) ─ ─ Add/Subtract: Change in fair value from end of prior fiscal year to vesting date for equity awards that vested in covered fiscal year $ (115,965) $ 72,940 $ (58,944) $ (46,976) Subtract: Fair Value at end of prior fiscal year for equity awards forfeited in covered fiscal year ─ ─ ─ $(7,393,214) CAP $ 15,443,346 $ 8,015,674 $ 6,085,443 $(1,780,923) | ||||
| Non-PEO NEO Average Total Compensation Amount | [1] | $ 2,235,972 | $ 1,844,990 | $ 1,393,465 | |
| Non-PEO NEO Average Compensation Actually Paid Amount | [1],[2] | $ 2,543,299 | 1,989,641 | 774,585 | |
| Adjustment to Non-PEO NEO Compensation Footnote [Text Block] | Executive Average Other NEOs Year 2022 2021 2020 Total Compensation per SCT $ 2,235,972 $ 1,844,990 $ 1,393,465 Deduct: Grant date fair value of equity awards granted in covered fiscal year $ (1,363,471) $ (921,231) $ (753,904) Add: Fair value at year-end of equity awards granted in covered fiscal year $ 1,219,331 $ 1,058,796 $ 677,039 Add/Deduct: Change in fair value from end of prior fiscal year to end of covered fiscal year for unvested equity awards granted prior to covered fiscal year $ 618,383 $ 27,191 $ (187,128) Add/Deduct: Change in fair value from end of prior fiscal year to vesting date for equity awards that vested in covered fiscal year $ 239,994 $ (2,497) $ (85,894) Deduct: Fair Value at end of prior fiscal year for equity awards forfeited in covered fiscal year $ (406,910) $ (17,608) $ (268,993) CAP $ 2,543,299 $ 1,989,641 $ 774,585 | ||||
| Compensation Actually Paid vs. Total Shareholder Return [Text Block] | CAP and Cumulative TSR: The following graph depicts the relationship between our Executive Compensation and Cumulative TSR for the Company and Peer Group. | ||||
| Compensation Actually Paid vs. Net Income [Text Block] | CAP and Net Income: The following graph depicts the relationship between our Executive Compensation and Net Income. | ||||
| Compensation Actually Paid vs. Company Selected Measure [Text Block] | CAP and Company Adjusted EBITDA (as adjusted): The following graph depicts the relationship between our Executive Compensation and our Company Selected Measure, Company Adjusted EBITDA (as adjusted). | ||||
| Tabular List [Table Text Block] | Financial Performance Measures The most important financial performance measures the Company utilized in 2022 are: ● Company Adjusted EBITDA ● Company Revenue ● Relative TSR | ||||
| Total Shareholder Return Amount | [3] | $ 97.67 | 66.26 | 60.86 | |
| Peer Group Total Shareholder Return Amount | [3],[4] | 87.59 | 126.80 | 113.76 | |
| Net Income (Loss) | [3] | $ 420,247,000 | $ 7,757,000 | $ (342,755,000) | |
| Company Selected Measure Amount | 169,365,635 | 132,496,414 | 127,266,395 | ||
| Grant date fair value of equity awards granted in covered fiscal year | |||||
| Pay vs Performance Disclosure [Table] | |||||
| Adjustment to Compensation Amount | $ (5,567,034) | $ (4,943,227) | $ (6,035,272) | ||
| Fair value at year-end of equity awards granted in covered fiscal year | |||||
| Pay vs Performance Disclosure [Table] | |||||
| Adjustment to Compensation Amount | 8,749,581 | 5,679,870 | 4,161,271 | ||
| Change in fair value from end of prior fiscal year to end of covered fiscal year for unvested equity awards granted prior to covered fiscal year | |||||
| Pay vs Performance Disclosure [Table] | |||||
| Adjustment to Compensation Amount | 4,461,951 | (53,696) | |||
| Adjustment Type 4 [Member] | |||||
| Pay vs Performance Disclosure [Table] | |||||
| Adjustment to Compensation Amount | $ (115,965) | 72,940 | (58,944) | ||
| Measure [Axis]: 1 | |||||
| Pay vs Performance Disclosure [Table] | |||||
| Measure Name | Adjusted EBITDA | ||||
| Measure [Axis]: 2 | |||||
| Pay vs Performance Disclosure [Table] | |||||
| Measure Name | Revenue | ||||
| Measure [Axis]: 3 | |||||
| Pay vs Performance Disclosure [Table] | |||||
| Measure Name | Relative TSR | ||||
| PEO [Member] | Adjustment Type 4 [Member] | |||||
| Pay vs Performance Disclosure [Table] | |||||
| Adjustment to Compensation Amount | (46,976) | ||||
| PEO [Member] | Fair Value at end of prior fiscal year for equity awards forfeited in covered fiscal year | |||||
| Pay vs Performance Disclosure [Table] | |||||
| Adjustment to Compensation Amount | (7,393,214) | ||||
| Non-PEO NEO [Member] | Grant date fair value of equity awards granted in covered fiscal year | |||||
| Pay vs Performance Disclosure [Table] | |||||
| Adjustment to Compensation Amount | $ (1,363,471) | (921,231) | (753,904) | ||
| Non-PEO NEO [Member] | Fair value at year-end of equity awards granted in covered fiscal year | |||||
| Pay vs Performance Disclosure [Table] | |||||
| Adjustment to Compensation Amount | 1,219,331 | 1,058,796 | 677,039 | ||
| Non-PEO NEO [Member] | Change in fair value from end of prior fiscal year to end of covered fiscal year for unvested equity awards granted prior to covered fiscal year | |||||
| Pay vs Performance Disclosure [Table] | |||||
| Adjustment to Compensation Amount | 618,383 | 27,191 | (187,128) | ||
| Non-PEO NEO [Member] | Adjustment Type 4 [Member] | |||||
| Pay vs Performance Disclosure [Table] | |||||
| Adjustment to Compensation Amount | 239,994 | (2,497) | (85,894) | ||
| Non-PEO NEO [Member] | Fair Value at end of prior fiscal year for equity awards forfeited in covered fiscal year | |||||
| Pay vs Performance Disclosure [Table] | |||||
| Adjustment to Compensation Amount | (406,910) | (17,608) | (268,993) | ||
| Current CEO [Member] | |||||
| Pay vs Performance Disclosure [Table] | |||||
| PEO Total Compensation Amount | 7,914,813 | 7,259,787 | 8,018,388 | ||
| PEO Actually Paid Compensation Amount | [2] | $ 15,443,346 | $ 8,015,674 | 6,085,443 | |
| PEO 2 [Member] | |||||
| Pay vs Performance Disclosure [Table] | |||||
| PEO Total Compensation Amount | [5] | 5,659,267 | |||
| Former CEO [Member] | |||||
| Pay vs Performance Disclosure [Table] | |||||
| PEO Actually Paid Compensation Amount | [2] | $ (1,780,923) | |||
| John Clendening [Member] | PEO [Member] | |||||
| Pay vs Performance Disclosure [Table] | |||||
| PEO Name | Mr. John Clendening | ||||
| Ms Bruder [Member] | Non-PEO NEO [Member] | |||||
| Pay vs Performance Disclosure [Table] | |||||
| PEO Name | Ms. Bruder | Ms. Bruder | Mses. Bruder | ||
| Messrs Mehlman [Member] | Non-PEO NEO [Member] | |||||
| Pay vs Performance Disclosure [Table] | |||||
| PEO Name | Messrs. Mehlman | Messrs. Mehlman | Mehlman | ||
| Messrs Mackay [Member] | Non-PEO NEO [Member] | |||||
| Pay vs Performance Disclosure [Table] | |||||
| PEO Name | Mackay | Mackay | Mackay | ||
| Messrs Campbell [Member] | Non-PEO NEO [Member] | |||||
| Pay vs Performance Disclosure [Table] | |||||
| PEO Name | Campbell | Campbell | Campbell | ||
| Carsley [Member] | Non-PEO NEO [Member] | |||||
| Pay vs Performance Disclosure [Table] | |||||
| PEO Name | Carsley | ||||
| Murray [Member] | Non-PEO NEO [Member] | |||||
| Pay vs Performance Disclosure [Table] | |||||
| PEO Name | Murray | ||||
| Messrs Athwal [Member] | Non-PEO NEO [Member] | |||||
| Pay vs Performance Disclosure [Table] | |||||
| PEO Name | Messrs. Athwal | ||||
| Current P E O 1 [Member] | |||||
| Pay vs Performance Disclosure [Table] | |||||
| PEO Total Compensation Amount | $ 7,914,813 | $ 7,259,787 | $ 8,018,388 | ||
| PEO Actually Paid Compensation Amount | $ 15,443,346 | $ 8,015,674 | 6,085,443 | ||
| Former PEO 1 [Member] | |||||
| Pay vs Performance Disclosure [Table] | |||||
| PEO Total Compensation Amount | 5,659,267 | ||||
| PEO Actually Paid Compensation Amount | $ (1,780,923) | ||||
| [1]Other NEOs for 2022 and 2021 were Ms. Bruder Messrs. Mehlman Mackay Campbell Mses. Bruder Carsley Murray Messrs. Athwal Campbell Mackay Mehlman Mr. John Clendening | |||||
