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Selected Quarterly Financial Data (Details) - USD ($)
 3 Months Ended 12 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
SELECTED QUARTERLY FINANCIAL DATA                      
Sales, net $ 12,629,000 $ 11,640,000 $ 9,596,000 $ 7,932,000 $ 8,264,000 $ 9,863,000 $ 7,475,000 $ 7,673,000 $ 41,797,179 $ 33,274,702 $ 34,493,838
Cost of sales 7,680,000 7,872,000 6,665,000 5,442,000 5,766,000 7,067,000 5,407,000 4,813,000 27,659,223 23,052,900 24,522,250
Gross Profit 4,949,000 3,768,000 2,931,000 2,490,000 2,498,000 2,796,000 2,068,000 2,860,000 14,137,956 10,221,802 9,971,588
Operating expenses 3,110,000 2,789,000 2,602,000 2,665,000 2,923,000 2,856,000 3,007,000 3,017,000      
Operating expenses                 11,166,116 11,811,847 13,750,168
Income from insurance proceeds         261,000            
Income (loss) from operations 1,839,000 979,000 329,000 (175,000) (164,000) (60,000) (939,000) (157,000)      
Income (loss) from operations                 2,971,840 (1,329,531) (3,778,580)
Interest and other income                 351,166 153,460 65,695
Interest (expense) and other income 59,000 91,000 110,000 91,000 42,000 39,000 35,000 28,000      
Interest expense (36,000) (41,000) (44,000) (46,000) (41,000) (42,000) (44,000) (50,000) (166,897) (177,190) (210,761)
Provision (benefit) for income taxes 1,000 4,000 3,000   (13,000)       7,875 (13,318) (187,608)
Net loss 1,861,000 1,025,000 392,000 (129,000) (150,000) (63,000) (948,000) (179,000) 3,148,234 (1,339,943) (3,736,038)
Preferred dividend requirements (177,000) (175,000) (175,000) (176,000) (177,000) (176,000) (176,000) (176,000) (702,618) (704,996) (704,996)
Loss applicable to common shareholders $ 1,684,000 $ 850,000 $ 217,000 $ (306,000) $ (327,000) $ (239,000) $ (1,124,000) $ (355,000) $ 2,445,616 $ (2,044,939) $ (4,441,034)
Basic earnings (loss) per share $ 0.05 $ 0.03 $ 0.01 $ (0.01) $ (0.01) $ (0.01) $ (0.03) $ (0.01) $ 0.07 $ (0.06) $ (0.14)
Diluted earnings (loss) per share 0.05 0.03 0.01 (0.01) (0.01) (0.01) (0.03) (0.01) $ 0.07 $ (0.06) $ (0.14)
Loss per share from continuing operations $ 0.05 $ 0.03 $ 0.01 $ (0.01) $ (0.01) $ (0.01) $ (0.03) $ (0.01)      
Basic (in shares) 32,674,954 32,674,954 32,674,954 32,666,454 32,666,454 32,666,454 32,666,454 32,666,454 32,672,475 32,666,454 31,958,121
Diluted (in shares) 32,710,248 32,674,954 32,674,954 32,666,454 32,666,454 32,666,454 32,666,454 32,666,454 32,672,475 32,666,454 31,958,121
Gross margin (as a percent) 39.20% 32.40% 30.50% 31.40% 30.20% 28.30% 27.70% 37.30%