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Segment information (Details Textual) (USD $) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013
Retail [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Depreciation, Amortization and Accretion, Net, Total | $ 598,223 | $ 508,259 | $ 1,231,496 | $ 1,018,899
Bulk [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Depreciation, Amortization and Accretion, Net, Total | 735,672 | 767,609 | 1,476,736 | 1,532,125
Services [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Depreciation, Amortization and Accretion, Net, Total | $ 22,474 | $ 73,182 | $ 57,448 | $ 146,363

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- Definition The aggregate net amount of depreciation, amortization, and accretion recognized during an accounting period. As a noncash item, the net amount is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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- Details
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