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Concentrations- Summary of client accounts (Details 1) (Customer Concentration Risk)	12 Months Ended
	Dec. 31, 2013
Accounts Receivable
Concentration Risk [Line Items]
Percentage of revenue from major customer	36.10%
Accounts Receivable | Trucking Company | MI
Concentration Risk [Line Items]
Percentage of revenue from major customer	8.70%
Accounts Receivable | Cable trenching utility | FL
Concentration Risk [Line Items]
Percentage of revenue from major customer	6.40%
Accounts Receivable | Importer | MI
Concentration Risk [Line Items]
Percentage of revenue from major customer	8.40%
Accounts Receivable | Aerospace servicer | NM
Concentration Risk [Line Items]
Percentage of revenue from major customer	6.20%
Accounts Receivable | Trucking Company | VA
Concentration Risk [Line Items]
Percentage of revenue from major customer	6.40%
Revenue
Concentration Risk [Line Items]
Percentage of revenue from major customer	16.30%
Revenue | Trucking Company | MI
Concentration Risk [Line Items]
Percentage of revenue from major customer	4.30%
Revenue | Cable trenching utility | FL
Concentration Risk [Line Items]
Percentage of revenue from major customer	3.40%
Revenue | Importer | MI
Concentration Risk [Line Items]
Percentage of revenue from major customer	3.00%
Revenue | Aerospace servicer | NM
Concentration Risk [Line Items]
Percentage of revenue from major customer	3.70%
Revenue | Trucking Company | VA
Concentration Risk [Line Items]
Percentage of revenue from major customer	1.90%

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 21

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13537-108611



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13531-108611



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 18

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592

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