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Summary of Significant Accounting Policies (Estimated Useful Lives of Fixed Assets) (Details)	12 Months Ended
	Dec. 31, 2021 USD ($)
Office buildings [Member]
Property, Plant and Equipment [Line Items]
Fixed assets, residual value	$ 0
Estimated Useful Lives (years)	36-47
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Fixed assets, residual value	$ 0
Estimated Useful Lives (years)	Lesser of term of the lease or the estimated useful lives of the assets
Vehicles [Member]
Property, Plant and Equipment [Line Items]
Fixed assets, residual value	$ 0
Estimated Useful Lives (years)	4
Office furniture [Member]
Property, Plant and Equipment [Line Items]
Fixed assets, residual value	$ 0
Estimated Useful Lives (years)	5
Computer equipment and hardware [Member]
Property, Plant and Equipment [Line Items]
Fixed assets, residual value	$ 0
Estimated Useful Lives (years)	4-5

X

- Definition

Describes the periods of time over which an entity anticipates to receive utility from its property, plant and equipment (that is, the periods of time over which an entity allocates the initial cost of its property, plant and equipment).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 35
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=123364984&loc=d3e1205-110223

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- 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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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The estimated or actual value of the asset at the end of its useful life or when it is no longer serviceable (cannot be used for its original purpose).

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_LeaseholdImprovementsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_VehiclesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_FurnitureAndFixturesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_ComputerEquipmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: