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SALES SERVICE REVENUE, NET AND ACCOUNTS RECEIVABLE (Schedule of Allowance for Doubtful Accounts) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Allowance for doubtful accounts, Beginning balance | $ (4,013) |
Adjustment for allowance for doubtful accounts | 152 | $ (1,339)
Bad debt expense | (2) |
Write-offs | 1,379 |
Total charges | (150) |
Allowance for doubtful accounts, Ending balance | (2,484) | (4,013)
Medicaid [Member] |  |
Adjustment for allowance for doubtful accounts | (5) | (53)
Medicare [Member] |  |
Adjustment for allowance for doubtful accounts | (58) | (387)
Third-Party Payor [Member] |  |
Adjustment for allowance for doubtful accounts | $ 215 | $ (899)

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