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CONDENSED STATEMENTS OF OPERATIONS - USD ($)
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Income Statement [Abstract]    
Services revenues $ 7,026,000 $ 4,304,000
Products revenues 393,000 463,000
Total Net Sales 7,419,000 4,767,000
Cost of services 4,404,000 3,819,000
Cost of goods sold 269,000 319,000
Total Cost of Sales 4,673,000 4,138,000
Gross Profit 2,746,000 629,000
Operating Expenses:    
Selling 903,000 888,000
Marketing 604,000 426,000
General and administrative 1,007,000 1,053,000
Total Operating Expenses 2,514,000 2,367,000
Operating Income (Loss) 232,000 (1,738,000)
Other income 5,000 3,000
Income (Loss) Before Income Taxes 237,000 (1,735,000)
Income tax expense (benefit) 73,000 (544,000)
Net Income (Loss) $ 164,000 $ (1,191,000)
Net income (loss) per share:    
Basic $ 0.01 $ (0.10)
Diluted $ 0.01 $ (0.10)
Shares used in calculation of net income (loss) per share:    
Basic 11,819,000 11,661,000
Diluted 11,982,000 11,661,000