Condensed Consolidated Balance Sheets (Parenthetical) (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Statement Of Financial Position [Abstract]
Accumulated Depreciation	$ 15,856	$ 14,826
Preferred Stock, shares authorized	150,000	150,000
Preferred Stock, shares issued	0	0
Preferred Stock, shares outstanding	0	0
Common Stock, par value	$ 0	$ 0
Common Stock, shares authorized	25,000,000	25,000,000
Common Stock, shares issued	19,689,873	19,645,773
Common Stock, shares outstanding	19,689,873	19,645,773