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Condensed Consolidated Balance Sheets (Unaudited) (USD $)
Mar. 31, 2012
Dec. 31, 2011
Current Assets:    
Cash and cash equivalents $ 199,867 $ 704,345
Certificates of deposit 5,798,000 5,880,000
Accounts receivable, net 6,210,192 [1] 4,398,426 [1]
Inventories, net 5,065,446 5,212,040
Deferred tax assets 419,191 420,191
Other current assets 323,309 347,737
Total current assets 18,016,005 16,962,739
Property, Plant and Equipment:    
Land 923,587 923,587
Land improvements 314,563 314,563
Buildings and improvements 6,169,545 6,169,545
Production equipment and other 28,907,266 28,785,896
Property, Plant and Equipment Gross 36,314,961 36,193,591
Less accumulated depreciation 28,526,667 28,298,066
Net property, plant and equipment 7,788,294 7,895,525
Total assets 25,804,299 24,858,264
Current Liabilities:    
Accounts payable 1,285,172 968,266
Accrued wages and salaries 653,433 374,964
Other accrued expenses 531,989 453,594
Unearned revenue and customer deposits 90,103 151,652
Total current liabilities 2,560,697 1,948,476
Deferred income taxes 770,275 785,275
Total liabilities 3,330,972 2,733,751
Commitments and contingencies (Note 3)      
Shareholders' Equity:    
Preferred stock    [2]    [2]
Common stock 1,138,096 [3] 1,138,096 [3]
Additional paid-in capital 447,134 447,134
Retained earnings 24,810,195 24,461,381
Treasury stock (3,922,098) [4] (3,922,098) [4]
Total shareholders' equity 22,473,327 22,124,513
Total liabilities and shareholders' equity $ 25,804,299 $ 24,858,264
[1] Net of allowance of $140,000.
[2] No par value, 500,000 shares authorized, none outstanding.
[3] $1.00 par value, 4,000,000 shares authorized, 1,138,096 shares issued, 966,132 shares outstanding.
[4] At cost, 171,964 shares.