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Geographic information (Details) (USD $)
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3 Months Ended | 6 Months Ended | 6 Months Ended | |||||||
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Jun. 30, 2014
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Jun. 30, 2013
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Jun. 30, 2014
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Jun. 30, 2013
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Jun. 30, 2014
United States [Member]
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Jun. 30, 2013
United States [Member]
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Dec. 31, 2013
United States [Member]
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Jun. 30, 2014
Foreign [Member]
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Jun. 30, 2013
Foreign [Member]
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Dec. 31, 2013
Foreign [Member]
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| Revenues from External Customers and Long-Lived Assets [Line Items] | ||||||||||
| Revenues - owned units | $ 10,124,208 | $ 9,128,267 | $ 18,278,100 | $ 18,515,030 | $ 18,264,189 | $ 18,459,970 | $ 13,911 | $ 55,060 | ||
| Management, incentive and royalty fee revenue | 2,143,132 | 1,853,252 | 4,262,160 | 3,448,470 | 2,400,754 | 2,299,487 | 1,861,407 | 1,148,984 | ||
| Net assets (liabilities) | $ 8,960,805 | $ 7,572,058 | $ 1,205,033 | $ 654,579 | ||||||
| X | ||||||||||
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- Definition
Amount of net assets (liabilities). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Aggregate revenue during the period from services rendered in the normal course of business, after deducting allowances and discounts. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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