Commitments (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Nov. 30, 2010	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Operating Leases
Initial term of the operating lease	5 years
Extension term upon the completion of the initial lease term	5 years
Rent expense		$ 200	$ 200	$ 700	$ 600
Future minimum annual lease commitments under the non-cancelable operating lease
Remainder 2016		234		234
2017		467		467
Total minimum lease payments		$ 701		$ 701