Quarterly report pursuant to sections 13 or 15(d)

Stock Plans and Non-Qualified Option Agreement (Details)

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Stock Plans and Non-Qualified Option Agreement (Details) (USD $)
 3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Shares [Abstract]        
Options outstanding (in shares)     528,800 607,967
Granted (in shares)     18,000 12,000
Exercised (in shares)     0 0
Forfeited (in shares)     (156,000) (85,067)
Options outstanding (in shares) 390,800 [1] 534,900 [1] 390,800 [1] 534,900 [1]
Options exercisable at year end (in shares) 352,800 [1] 432,900 [2] 352,800 [1] 432,900 [2]
Options vested and expected to be vested at end of year (in shares) 390,800 534,900 390,800 534,900
Weighted Average Exercise Price [Abstract]        
Options outstanding (in dollars per share)     $ 9.82 $ 9.89
Granted (in dollars per share)     $ 2.79 $ 5.50
Exercised (in dollars per share)     $ 0 $ 0
Forfeited (in dollars per share)     $ 8.28 $ 9.52
Options outstanding (in dollars per share) $ 9.66 [1] $ 9.85 [1] $ 9.66 [1] $ 9.85 [1]
Options exercisable (in dollars per share) $ 10.11 [1] $ 10.52 [2] $ 10.11 [1] $ 10.52 [2]
Options vested and expected to be vested (in dollars per share) $ 9.66 $ 9.85 $ 9.66 $ 9.85
Weighted Average Remaining Contractual Term [Abstract]        
Options outstanding end of period (in years) 3 years 2 months 12 days [1] 3 years 8 months 12 days [1]    
Options exercisable (in years) 2 years 10 months 24 days [1] 2 years 9 months 18 days [2]    
Options vested and expected to be vested (in years) 3 years 2 months 12 days 3 years 8 months 12 days    
Aggregate Intrinsic Value [Abstract]        
Exercised     $ 0 $ 0
Options outstanding end of year 15,900 [1] 0 [1] 15,900 [1] 0 [1]
Options exercisable 0 [1] 0 [2] 0 [1] 0 [2]
Options vested and expected to be vested $ 15,900 $ 0 $ 15,900 $ 0
Options exercise price range, minimum (in dollars per share)     $ 5.50 $ 7.05
Options exercise price range, maximum (in dollars per share)     $ 14.75 $ 14.75
[1] Options with exercise prices ranging from $5.50 to $14.75
[2] Options with exercise prices ranging from $7.05 to $14.75