Quarterly report pursuant to Section 13 or 15(d)

Unaudited Condensed Consolidated Balance Sheets (Parenthetical)

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Unaudited Condensed Consolidated Balance Sheets (Parenthetical) (USD $)
Mar. 31, 2013
Dec. 31, 2012
Stockholders' equity    
Common stock, par value (in dollars per share) $ 0.05 $ 0.05
Common stock, authorized (in shares) 15,000,000 15,000,000
Common stock, issued (in shares) 5,333,077 5,293,316
Common stock, outstanding (in shares) 5,333,077 5,293,316