Quarterly report pursuant to Section 13 or 15(d)

Unaudited Consolidated Balance Sheets (Parenthetical)

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Unaudited Consolidated Balance Sheets (Parenthetical) (USD $)
Mar. 31, 2015
Dec. 31, 2014
Stockholders' equity    
Common stock, par value (in dollars per share) $ 0.05us-gaap_CommonStockParOrStatedValuePerShare $ 0.05us-gaap_CommonStockParOrStatedValuePerShare
Common stock, authorized (in shares) 15,000,000us-gaap_CommonStockSharesAuthorized 15,000,000us-gaap_CommonStockSharesAuthorized
Common stock, issued (in shares) 5,374,863us-gaap_CommonStockSharesIssued 5,358,261us-gaap_CommonStockSharesIssued
Common stock, outstanding (in shares) 5,374,863us-gaap_CommonStockSharesOutstanding 5,358,261us-gaap_CommonStockSharesOutstanding