Distribution Agreement (Details) - Baxter Healthcare Organization - USD ($)		12 Months Ended
	Oct. 02, 2014	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Distribution agreement term	10 years
Upfront fee	$ 20,000,000
Recognized Distribution Agreement Income		$ 2,099,028	$ 2,065,785	$ 2,081,668
Payment (made) received		$ 0
Agreement termination notice period		270 days
Agreement termination significant price increase notice period		45 days
Agreement termination limited non-compete period		2 years
Agreement Refund Trigger Event repayment percent first criteria		33.00%
Agreement Refund Trigger Event repayment percent second criteria		25.00%
Agreement property infringement repayment amount first criteria		$ 10,000,000
Agreement property infringement repayment amount second criteria		$ 6,600,000
Agreement extension period		5 years
Extension fee		$ 7,500,000