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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Fair Value of Financial Instruments and Recently Issued Accounting Pronouncements (Details) |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Oct. 31, 2023 USD ($) | Oct. 31, 2022 USD ($) | Apr. 30, 2023 USD ($) | Sep. 30, 2023 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Fair Value of Financial Instruments |  |  |  |  |  |  |
Transfers of financial assets between Level 1 and Level 2 |  |  |  |  | $ 0 |  |
Transfers of financial assets between Level 2 and Level 1 |  |  |  |  | 0 |  |
Transfers of financial assets into Level 3 |  |  |  |  | 0 |  |
Transfers of financial assets out of Level 3 |  |  |  |  | 0 |  |
Liabilities: |  |  |  |  |  |  |
Contingent consideration |  |  |  |  | $ 5,894,000 | $ 5,593,000 | $ 2,420,000
Contingent consideration, valuation technique extensible list |  |  |  |  | us-gaap:IncomeApproachValuationTechniqueMember |  |
Contingent consideration, measurement input extensible list |  |  |  |  | us-gaap:MeasurementInputDiscountRateMember |  |
Contingent consideration, measurement input |  |  |  |  | 0.049 | 0.025 |
Change in the contingent consideration liability |  |  |  |  |  |  |
Beginning Balance |  |  |  |  | $ 5,593,000 | $ 2,420,000 |
Contingent consideration payment |  |  | $ (1,500,000) |  | (1,460,000) | (1,000,000) | (2,558,000)
Accretion of contingent consideration |  |  |  |  | 104,000 | 33,000 |
Ending Balance |  |  |  |  | 5,894,000 | 5,593,000 | $ 2,420,000
Outstanding borrowings |  |  |  |  | 79,200,000 | 79,200,000 |
Fair value of outstanding borrowing |  |  |  |  | $ 79,800,000 | $ 76,500,000 |
Debt instrument, valuation technique, extensible list |  |  |  |  | us-gaap:ValuationTechniqueDiscountedCashFlowMember |  |
Debt instrument, measurement input |  |  |  |  | 0.069 | 0.063 |
Borrowing against revolver |  |  |  | $ 5,000,000.0 | $ 84,175,000 | $ 9,000,000 |
Revolver repaid |  |  |  | $ 5,000,000.0 | 84,175,000 |  |
Accumulated deficit |  |  |  |  | (102,703,000) | (108,747,000) |
Allowance for credit losses |  |  |  |  | 5,288,000 | 272,000 |
Cumulative effect adjustment | ASU 2016-13 |  |  |  |  |  |  |
Change in the contingent consideration liability |  |  |  |  |  |  |
Accumulated deficit |  |  |  |  |  | (100,000) |
Allowance for credit losses |  |  |  |  |  | 100,000 |
Neuralify |  |  |  |  |  |  |
Change in the contingent consideration liability |  |  |  |  |  |  |
Earnout adjustment |  |  |  |  |  | (1,420,000) |
Earnout payment |  |  |  |  |  | (1,000,000) |
Change 4 Growth |  |  |  |  |  |  |
Change in the contingent consideration liability |  |  |  |  |  |  |
Contingent consideration payment |  |  |  |  | (1,460,000) |  |
Contingent consideration accrued |  | $ 5,560,000 |  |  |  | 5,560,000 |
Ventana Research |  |  |  |  |  |  |
Liabilities: |  |  |  |  |  |  |
Contingent consideration |  |  |  |  | 1,700,000 |  |
Change in the contingent consideration liability |  |  |  |  |  |  |
Contingent consideration accrued | $ 1,657,000 |  |  |  | 1,657,000 |  |
Ending Balance |  |  |  |  | 1,700,000 |  |
Recurring |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |
Cash equivalents |  |  |  |  | 7,067,000 | 18,000 |
Total |  |  |  |  | 7,067,000 | 18,000 |
Liabilities: |  |  |  |  |  |  |
Contingent consideration |  |  |  |  | 5,894,000 | 5,593,000 |
Total |  |  |  |  | 5,894,000 | 5,593,000 |
Change in the contingent consideration liability |  |  |  |  |  |  |
Beginning Balance |  |  |  |  | 5,593,000 |  |
Ending Balance |  |  |  |  | 5,894,000 | 5,593,000 |
Recurring | Level 1 |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |
Cash equivalents |  |  |  |  | 7,067,000 | 18,000 |
Total |  |  |  |  | 7,067,000 | 18,000 |
Recurring | Level 3 |  |  |  |  |  |  |
Liabilities: |  |  |  |  |  |  |
Contingent consideration |  |  |  |  | 5,894,000 | 5,593,000 |
Total |  |  |  |  | 5,894,000 | 5,593,000 |
Change in the contingent consideration liability |  |  |  |  |  |  |
Beginning Balance |  |  |  |  | 5,593,000 |  |
Ending Balance |  |  |  |  | $ 5,894,000 | $ 5,593,000 |

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