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STATEMENTS OF STOCKHOLDERS' EQUITY (USD $)
Common Stock [Member]
Additional Paid-In Capital [Member]
Retained Earnings [Member]
Treasury Stock [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Total
BALANCE at Dec. 31, 2011 $ 326,115 $ 9,911,914 $ (614,315) $ (562,469) $ (40,812) $ 9,020,433
BALANCE (in shares) at Dec. 31, 2011 3,261,148     257,114    
Net income 0 0 154,761 0 0 154,761
Other comprehensive income, net of taxes 0 0 0 0 5,610 5,610
Exercise of stock options 0 17,986 0 32,814 0 50,800
Exercises of stock options (in shares)       (15,000)    
Tax benefits related to stock options 0 6,842 0 0 0 6,842
Stock-based compensation 0 8,656 0 0 0 8,656
BALANCE at Mar. 31, 2012 326,115 9,945,398 (459,554) (529,655) (35,202) 9,247,102
BALANCE (in shares) at Mar. 31, 2012 3,261,148     242,114    
BALANCE at Dec. 31, 2012 326,115 9,973,146 (524,803) (529,655) (50,120) 9,194,683
BALANCE (in shares) at Dec. 31, 2012 3,261,148     242,114    
Net income 0 0 204,310 0 0 204,310
Other comprehensive income, net of taxes 0 0 0 0 5,810 5,810
Stock-based compensation 0 8,381 0 0 0 8,381
BALANCE at Mar. 31, 2013 $ 326,115 $ 9,981,527 $ (320,493) $ (529,655) $ (44,310) $ 9,413,184
BALANCE (in shares) at Mar. 31, 2013 3,261,148     242,114