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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) | 12 Months Ended
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Dec. 31, 2020
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |
Schedule of depreciation of property and equipment is estimated useful life of the related assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
Leasehold improvements (in years) |  | ​ | ​ | 10 or lease term if shorter | ​ | ​
Equipment (in years) |  | 3 |  | — |  | 10
Furniture, fixtures, fittings and other (in years) |  | 2 | ​ | — |  | 10
Schedule of amortization of intangible assets is contractual or estimated useful life of the assets | ​
​ | ​ | ​
Patents (in years) |  | 5
SAP Licenses (in years) |  | 10
Other licenses (in years) |  | 5
Trade name and trademark (in years) |  | 7

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