Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Statement Of Financial Position [Abstract]
Allowance for doubtful accounts	$ 469	$ 447
Inventories reserves	$ 682	$ 768
Preferred stock, par value	$ 1.00	$ 1.00
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	35,000,000	35,000,000
Common stock, shares issued	18,100,589	17,047,093
Common stock, shares outstanding	18,067,122	17,013,622
Treasury stock, shares	33,467	33,467