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BUSINESS ACQUISITIONS - Anova Data Narrative (Details) - USD ($) $ in Thousands |  |  | 3 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Mar. 04, 2020 | Jan. 31, 2019 | Dec. 31, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2018
Business Acquisition [Line Items] |  |  |  |  |  |
Shares of common stock issued as purchase |  |  |  | $ 108,550 | $ 15,186 |
Goodwill |  |  | $ 224,896 | $ 416,892 | $ 389,196 | $ 383,655
Anova Data, Inc. |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Common stock to be issued (in shares) |  | 2,900,000 |  |  |  |
Shares of common stock issued as purchase |  | $ 15,200 |  |  |  |
Number of additional shares potentially issued (in number of shares) |  | 330,000 |  |  |  |
Fair value of additional shares potentially issued |  | $ 1,700 |  |  |  |
Number of shares issued after post-closing adjustments (in shares) | 316,551 |  |  |  |  |
Fair value of total consideration |  |  | 16,900 |  |  |
Finite-lived intangibles |  |  | $ 11,200 |  |  |
Weighted average useful life of intangible assets (in years) |  |  | 6 years 3 months |  |  |
Net assets acquired |  |  | $ 100 |  |  |
Goodwill |  |  | $ 5,500 |  |  |

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