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v3.20.1

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% |  |  |

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