Accrued expenses (Tables)

12 Months Ended

Dec. 31, 2014

Accrued Liabilities, Current [Abstract]

Schedule of Accrued Liabilities [Table Text Block]

Accrued expenses consisted of the following:

	December 31,		December 31,
	2014		2013
Customer deposits		2,516,202		1,795,803
Accrued compensation and benefits		984,227		795,584
Other payables		379,019		242,993
Accrued interest		1,025,623		2,250
Due to Arthrex		324,531		1,630,564
Accrued professional fees		285,446		199,634
Accrued loss on abandonment of lease, current portion		103,176		—
Accrued Angel machine refurbishment costs		600,000		—
	$	6,218,224	$	4,666,828