Acquisition (Narrative) (Details) - USD ($) $ in Thousands		12 Months Ended
	Aug. 01, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Acquisition [Abstract]
Cash to acquire Halsey, gross	$ 1,700
Common stock issued for acquisition	$ 5,400	$ 0	$ 5,430	$ 0
Common stock issued for acquisition, shares	136,543
Contingent consideration liability	$ 2,904