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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($)
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings, Appropriated [Member]
Retained Earnings [Member]
Total
Balance at Dec. 31, 2017 $ 28,192 $ 38,682,377 $ 6,241 $ 29,730,794 $ 68,447,604
Balance (in Shares) at Dec. 31, 2017 28,191,927        
Exercise of options - employees $ 8 (8)      
Exercise of options - employees (in Shares) 7,730        
Stock issued to employees $ 15 34,035     34,050
Stock issued to employees (in Shares) 15,000        
Stock issued for service $ 87 131,764     131,851
Stock issued for service (in Shares) 87,081        
Stock options vested to board of directors and employees   404,078     404,078
Net income (loss)       1,655,021 1,655,021
Balance at Mar. 31, 2018 $ 28,302 39,252,246 6,241 31,385,815 70,672,604
Balance (in Shares) at Mar. 31, 2018 28,301,738        
Balance at Dec. 31, 2018 $ 28,567 39,841,149 6,241 35,030,419 $ 74,906,376
Balance (in Shares) at Dec. 31, 2018 28,566,652       28,566,652
Stock issued to employees $ 7 5,768     $ 5,775
Stock issued to employees (in Shares) 7,500        
Stock issued for service $ 112 159,253     159,365
Stock issued for service (in Shares) 112,300        
Net income (loss)       (147,531) (147,531)
Balance at Mar. 31, 2019 $ 28,686 $ 40,006,170 $ 6,241 $ 34,882,888 $ 74,923,985
Balance (in Shares) at Mar. 31, 2019 28,686,452       28,686,452