Other Assets (Details) - USD ($) $ in Thousands	1 Months Ended
	Apr. 30, 2016	Sep. 30, 2016	Dec. 31, 2015
Other assets		$ 1,879	$ 1,428
Prepaid and other current assets		4,887	$ 4,077
Research and collaboration agreement
Payment for research and collaboration agreement and investment in company	$ 3,500
Other assets	1,800
Prepaid and other current assets	$ 1,700	$ 800