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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Inventory, Property, plant and equipment, Impairment of Long Lived Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Impairment for long-lived assets	$ 0	$ 0
Non current inventory	$ 8,656	$ 11,930
Buildings and improvements | Minimum
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Useful lives	30 years
Buildings and improvements | Maximum
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Useful lives	39 years
Vehicles
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Useful lives	5 years
Machinery and equipment
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Useful lives	7 years
Furniture and fixtures
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Useful lives	7 years

X

- Definition

The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
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-Section 50
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-SubTopic 220
-Section 45
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- Definition

Inventories not expected to be converted to cash, sold or exchanged within the normal operating cycle.

+ 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
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- Definition

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+ References

No definition available.

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- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

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