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Significant Accounting Policies (Estimated Useful Lives of Property and Equipment) (Details)	12 Months Ended
	Dec. 31, 2016
Transportation Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment useful life	5 years
Minimum [Member] | Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment useful life	3 years
Minimum [Member] | Furniture and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment useful life	5 years
Minimum [Member] | Computer Software [Member]
Property, Plant and Equipment [Line Items]
Property and equipment useful life	5 years
Maximum [Member] | Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment useful life	5 years
Maximum [Member] | Furniture and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment useful life	7 years
Maximum [Member] | Computer Software [Member]
Property, Plant and Equipment [Line Items]
Property and equipment useful life	10 years

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

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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Period Type:	duration

X

- Details

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Namespace Prefix:
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X

- Details

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X

- Details

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Namespace Prefix:
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X

- Details

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X

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
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