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Summary of Significant Accounting Policies - Plant, Equipment and Leasehold Improvements (Details)	12 Months Ended
	Dec. 31, 2018
Minimum
Plant, Equipment and Leasehold Improvements
Useful life (in years)	3 years
Maximum
Plant, Equipment and Leasehold Improvements
Useful life (in years)	10 years

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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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.

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	duration

X

- Details

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