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Stock-Based Compensation Plans (Details 1) (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Summary of stock option activity under the Option Plan    
Shares under option outstanding beginning balance 1,661,750 1,845,250
Weighted average exercise price outstanding beginning balance $ 0.98 $ 0.96
Shares under option, granted 322,500 299,000
Weighted average exercise price, granted $ 0.74 $ 0.74
Shares under option, exercised (34,500) (112,500)
Weighted average exercise price, exercised $ 0.39 $ 0.43
Shares under option, forfeited (448,250) (370,000)
Weighted average exercise price, forfeited $ 0.97 $ 0.85
Shares under option outstanding ending balance 1,501,500 1,661,750
Weighted average exercise price outstanding ending balance $ 0.95 $ 0.98
Outstanding, weighted average exercise remaining contractual life 6 years 3 months 6 years 3 months
Outstanding aggregate intrinsic value $ 78 $ 98
Shares under option, exercisable ending balance 810,623 808,252
Weighted average exercise price, exercisable ending balance $ 1.11 $ 1.11
Exercisable, weighted average exercise remaining contractual life 5 years 9 months 18 days 6 years 8 months 12 days
Exercisable aggregate intrinsic value $ 50 $ 58