Intangible Assets and Royalty Agreement - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 418	$ 631	$ 1,451	$ 1,889
Eliminated accumulated depreciation expense	626		626
Stability Biologics, LLC
Finite-Lived Intangible Assets [Line Items]
Eliminated accumulated depreciation expense	1,932		1,932
Distribution Agreement
Finite-Lived Intangible Assets [Line Items]
Intangible assets acquired	510		510
Non compete agreements
Finite-Lived Intangible Assets [Line Items]
Intangible assets acquired	$ 120		$ 120		$ 830