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v3.26.1

SHAREHOLDERS' EQUITY (Narrative) (Details) ₪ / shares in Units, $ / shares in Units, ₪ in Thousands, $ in Thousands | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Jul. 31, 2025 USD ($) shares | Jun. 24, 2025 USD ($) $ / shares shares | Dec. 31, 2025 USD ($) $ / shares shares | Dec. 31, 2024 USD ($) $ / shares shares | Dec. 31, 2023 USD ($) | Dec. 31, 2025 ILS (₪) ₪ / shares shares | Dec. 31, 2025 USD ($) shares | Dec. 31, 2024 ₪ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Share capital, amount authorized | ₪ |  |  |  |  |  | ₪ 20,000,000 |  |
Common Stock, Shares Authorized |  |  |  |  |  | 200,000,000 | 200,000,000 | 200,000,000
Common Stock, Par or Stated Value Per Share | ₪ / shares |  |  |  |  |  | ₪ 0.1 |  | ₪ 0.1
Shares available for future issuance |  |  |  |  |  | 46,935 | 46,935 |
Ordinary shares issued, exercise of option |  |  | 40,000 |  |  |  |  |
Proceeds from exercise of option | $ |  |  | $ 238 | $ 1 | $ 0 |  |  |
Private placement [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of shares issued in private placement |  | 5,000,000 |  |  |  |  |  |
Shares issued, price per share | $ / shares |  | $ 8 |  |  |  |  |  |
Number of shares issued in consideration for extinguishment of debt |  | 1,249,995 |  |  |  |  |  |
Shares issued in consideration for extinguishment of debt | $ |  | $ 8,590 |  |  |  |  |  |
Proceeds from issuance of private placement | $ |  | $ 37,691 |  |  |  |  |  |
Ordinary shares issued, exercise of option | 750,000 |  |  |  |  |  |  |
Proceeds from exercise of option | $ | $ 5,670 |  |  |  |  |  |  |
Stock Compensation Plan [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Unrecognized compensation cost, recognition period |  |  | 2 years 4 months 2 days |  |  |  |  |
Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Unrecognized compensation cost related to non-vested stock options | $ |  |  |  |  |  |  | $ 10,725 |
Unrecognized compensation cost, recognition period |  |  | 2 years 4 months 2 days |  |  |  |  |
Granted |  |  | 1,559,487 |  |  |  |  |
Granted | $ / shares |  |  | $ 6.64 |  |  |  |  |
Restricted Stock Units (RSUs) [Member] | 2016 option plan |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Granted |  |  | 1,559,487 | 2,531,837 |  |  |  |
Granted | $ / shares |  |  | $ 6.64 | $ 2.44 |  |  |  |
Equity instruments other than options, vested in period, fair value | $ |  |  | $ 17,000 | $ 3,057 |  |  |  |
Restricted Stock Units (RSUs) [Member] | 2016 option plan | Minimum [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Vesting period for plan |  |  | 1 year |  |  |  |  |
Restricted Stock Units (RSUs) [Member] | 2016 option plan | Maximum [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Vesting period for plan |  |  | 4 years |  |  |  |  |

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Name: | us-gaap_PlanNameAxis=allt_TwoThousandSixteenPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |