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PROPERTY AND EQUIPMENT - Additional Information (Details) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 USD ($) ft² | Sep. 30, 2018 USD ($) | Sep. 30, 2019 USD ($) ft² | Sep. 30, 2018 USD ($)
Property Plant And Equipment [Line Items] |  |  |  |
Depreciation expense | $ 3,200 | $ 1,700 | $ 8,958 | $ 6,094
Ewing, New Jersey Properties [Member] |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |
Area of facility acquired | ft² | 88,000 |  | 88,000 |
Cost of facilty acquired |  |  | $ 8,200 |

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- Definition The cash outflow for acquisition of buildings (properties) whether for investment or use. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585 + Details
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- Details
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