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DEBT - Schedule of Debt (Details) - USD ($) $ in Thousands | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Debt Instrument [Line Items] |  |
Total debt | $ 42 | $ 46,714
Less current portion of long-term debt | (23) | (21)
Long-term debt, net of current portion | 19 | 46,693
Lines of credit |  |
Debt Instrument [Line Items] |  |
Total debt | 0 | 26,677
Term loans |  |
Debt Instrument [Line Items] |  |
Total debt | 0 | 19,980
Capital leases |  |
Debt Instrument [Line Items] |  |
Total debt | $ 42 | $ 57

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