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PROPERTY AND EQUIPMENT (Tables) | 9 Months Ended
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Sep. 30, 2020
PROPERTY AND EQUIPMENT |
Schedule of details of property and equipment | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | September 30, | ​ | December 31, | ​
​ |  | 2020 |  | 2019 | ​
Buildings and land | ​ | $ | 1,654 | ​ | $ | 1,693 | ​
Machinery and equipment | ​ |  | 107,038 | ​ |  | 108,945 | ​
Computer and communication equipment | ​ |  | 25,258 | ​ |  | 29,106 | ​
Furniture and fixtures | ​ |  | 4,203 | ​ |  | 4,119 | ​
Vehicles | ​ |  | 261 | ​ |  | 262 | ​
Leasehold improvements | ​ |  | 41,590 | ​ |  | 33,041 | ​
Construction in process | ​ |  | 12,259 | ​ |  | 9,089 | ​
​ | ​ |  | 192,263 | ​ |  | 186,255 | ​
Less: Accumulated depreciation | ​ |  | (82,288) | ​ |  | (78,146) | ​
Property and equipment, net | ​ | $ | 109,975 | ​ | $ | 108,109 | ​
Schedule of depreciation expense recorded in continuing operations | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended September 30, | ​ | Nine Months Ended September 30, | ​
​ |  | 2020 |  | 2019 |  | 2020 |  | 2019 | ​
Depreciation expense | ​ | $ | 7,188 | ​ | $ | 3,903 | ​ | $ | 20,369 | ​ | $ | 8,452 | ​

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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(13)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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