General information, details (Details)	6 Months Ended
Jun. 30, 2014	Jun. 30, 2013
[MinimumMember]
Concentration Risk [Line Items]
Concentration Risk, Percentage	10.00%	10.00%
[MajorCustomerMember]
Concentration Risk [Line Items]
Concentration Risk, Percentage		29.00%
[MajorCustomerBMember]
Concentration Risk [Line Items]
Concentration Risk, Percentage	26.00%	23.00%
[MajorCustomerCMember]
Concentration Risk [Line Items]
Concentration Risk, Percentage	32.00%
[MajorCustomerDMember]
Concentration Risk [Line Items]
Concentration Risk, Percentage	19.00%	38.00%
[MajorCustomerEMember]
Concentration Risk [Line Items]
Concentration Risk, Percentage	15.00%

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.

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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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration