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Income Taxes (Tables)
12 Months Ended
Dec. 31, 2017
Income Tax Disclosure [Abstract]  
Schedule Of Income Tax Benefit
Year Ended December 31   2017     2016  
Current taxes - Federal   $ (316,000 )   $ (729,000 )
Current taxes - State     6,000       (50,000 )
Deferred taxes - Federal     (23,000 )     1,000  
Deferred taxes - State     63,000       (36,000 )
Income tax benefit   $ (270,000 )   $ (814,000 )
Reconciliation Of Effective Income Tax Rate Percentage

Year Ended December 31

  2017     2016  
Federal statutory rate     34.0 %     34.0 %
Stock-based awards     (7.0 )     2.1  
State taxes     1.5       6.3  
Other permanent differences     (1.8 )     (0.8 )
Impact of uncertain tax positions     (3.0 )     (1.2 )
Valuation allowance     (8.5 )     (1.5 )
Tax rate change     14.7       -  
Other     (0.2 )     (0.1 )
Effective federal income tax rate     29.7 %     38.8 %
Schedule of Resulting Noncurrent Deferred Tax Assets (Liabilities)
As of December 31   2017     2016  
Deferred tax assets            
Accrued expenses   $ 183,000     $ 171,000  
Inventory reserve     42,000       65,000  
Stock-based awards     52,000       53,000  
Reserve for bad debts     50,000       51,000  
Net operating loss and credit carryforwards     61,000       26,000  
Other     25,000       38,000  
Valuation allowance     (108,000 )     (31,000 )
Total deferred tax assets   $ 305,000     $ 373,000  
                 
Deferred tax liabilities                
Depreciation   $ (465,000 )   $ (400,000 )
Prepaid expenses     (85,000 )     (175,000 )
Prepaid compensation     -       (3,000 )
Total deferred tax liabilities     (550,000 )     (578,000 )
                 
Net deferred income tax liabilities   $ (245,000 )   $ (205,000 )
Reconciliation of the Liability for Uncertain Tax Positions
Balance at January 1, 2016   $ 528,000  
Decreases due to current year positions     (2,000 )
Increases due to interest     28,000  
Balance at December 31, 2016     554,000  
Increases due to interest     27,000  
Balance at December 31, 2017   $ 581,000