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Accounts payable and accrued expenses (Detail Textual) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Accounts Payable And Accrued Expenses [Line Items]
Other Accrued Liabilities, Current	$ 1,873,557	$ 388,109
Arthrex [Member]
Accounts Payable And Accrued Expenses [Line Items]
Other Accrued Liabilities, Current	$ 1,631,000

Carrying value as of the balance sheet date of obligations incurred through that date and payable arising from transactions not otherwise specified in the taxonomy. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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