Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	17,868,372	17,653,879
Common stock, shares outstanding	17,188,137	16,973,644
Treasury stock, shares	680,235	680,235