Equity Method of Accounting for Common Stock of Ascendance Biotechnology, Inc. (Details) - USD ($)		3 Months Ended		9 Months Ended
	May 31, 2016	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 09, 2015
Business Acquisition [Line Items]
Loss on investment		$ (855,000)	$ 0	$ (1,189,000)	$ 0
Ascendance Biotechnology, Inc [Member]
Business Acquisition [Line Items]
Acquired equity interest						51.20%
Additional investment	$ 230,000	$ 100,000		$ 100,000
Decrease in ownership percentage	47.00%			49.90%
Loss on investment				$ 1,200,000