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SALES SERVICE REVENUE, NET AND ACCOUNTS RECEIVABLE (Schedule of Allowance for Doubtful Accounts) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Allowance for doubtful accounts, Beginning balance | $ (1,708) |
less allowance for doubtful accounts | (968) | $ (584)
Allowances for doubtful accounts | (4,095) | (3,448)
Bad debt expense | (2) |
Total charges | (966) |
Allowance for doubtful accounts, Ending balance | (2,674) | (1,708)
Medicaid [Member] |  |
less allowance for doubtful accounts | (28) | (50)
Allowances for doubtful accounts | (28) | (50)
Medicare [Member] |  |
less allowance for doubtful accounts | (251) | (150)
Allowances for doubtful accounts | (1,669) | (1,000)
Third Party Payer [Member] |  |
less allowance for doubtful accounts | (689) | (384)
Allowances for doubtful accounts | $ (1,725) | $ (960)

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- Definition Amount of increase (decrease) in allowance for credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919249-210447 + Details
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