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SALES SERVICE REVENUE, NET AND ACCOUNTS RECEIVABLE (Schedule of Allowance for Doubtful Accounts) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Allowance for doubtful accounts, Beginning balance |  |  | $ (2,354) |
Adjustment for allowance for doubtful accounts | $ (112) | $ (87) | (124) | $ (167)
Total charges |  |  | 124 |
Allowance for doubtful accounts, Ending balance | $ (2,478) |  | (2,478) |
Medicaid [Member] |  |  |  |
Adjustment for allowance for doubtful accounts |  |  | (6) |
Medicare [Member] |  |  |  |
Adjustment for allowance for doubtful accounts |  |  | (23) |
Third-Party Payor [Member] |  |  |  |
Adjustment for allowance for doubtful accounts |  |  | (83) |
Self-Pay [Member] |  |  |  |
Adjustment for allowance for doubtful accounts |  |  | $ (12) |

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