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STATEMENTS OF OPERATIONS - USD ($)
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Sales, net $ 81,862,453 $ 41,797,179 $ 33,274,702
Cost of sales      
Total cost of sales 44,854,100 27,659,223 23,052,900
Gross profit 37,008,353 14,137,956 10,221,802
Operating expenses:      
Sales and marketing 4,061,904 4,217,863 4,404,441
Research and development 574,527 516,095 621,365
General and administrative 8,301,169 6,432,158 6,786,041
Total operating expenses 12,937,600 11,166,116 11,811,847
Income from insurance proceeds     260,514
Income (loss) from operations 24,070,753 2,971,840 (1,329,531)
Interest and other income 2,262,758 351,166 153,460
Interest expense (260,264) (166,897) (177,190)
Income (loss) before income taxes 26,073,247 3,156,109 (1,353,261)
Provision (benefit) for income taxes 1,850,234 7,875 (13,318)
Net income (loss) 24,223,013 3,148,234 (1,339,943)
Preferred Stock dividend requirements (573,868) (702,618) (704,996)
Deemed contribution on extinguishment of preferred stock 2,975,708    
Income (loss) applicable to common shareholders $ 26,624,853 $ 2,445,616 $ (2,044,939)
Basic earnings (loss) per share $ 0.80 $ 0.07 $ (0.06)
Diluted earnings (loss) per share $ 0.80 $ 0.07 $ (0.06)
Weighted average common shares outstanding:      
Basic (in shares) 33,169,307 32,672,475 32,666,454
Diluted (in shares) 33,300,654 32,672,475 32,666,454
Costs of manufactured product      
Cost of sales      
Total cost of sales $ 39,377,794 $ 24,209,401 $ 20,108,798
Royalty expense to shareholder      
Cost of sales      
Total cost of sales $ 5,476,306 $ 3,449,822 $ 2,944,102