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Quarterly Financial Information (unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract] |
Summary of Quarterly Results of Operations | The following is a summary of the quarterly results of operations for the years ended December 31, 2018 and 2017:
|  | For the Three Months Ended |
|  | December 31, 2018 |  |  | September 30, 2018 |  |  | June 30, 2018 |  |  | March 31, 2018 |
Sales |  | $ | 16,561,520 |  |  | $ | 15,786,913 |  |  | $ | 14,971,681 |  |  | $ | 13,305,098 |
Gross Profit |  |  | 6,850,134 |  |  |  | 6,865,342 |  |  |  | 6,601,521 |  |  |  | 6,194,171 |
Total operating expenses |  |  | 5,730,406 |  |  |  | 6,558,122 |  |  |  | 10,250,807 |  |  |  | 7,357,840 |
Net income (loss) |  |  | 1,274,559 |  |  |  | 437,259 |  |  |  | (3,190,347 | ) |  |  | (1,105,791 | )
Basic net income (loss) per share |  | $ | 0.13 |  |  | $ | 0.05 |  |  | $ | (0.34 | ) |  | $ | (0.12 | )
Diluted net income (loss) per share |  | $ | 0.13 |  |  | $ | 0.04 |  |  | $ | (0.34 | ) |  | $ | (0.12 | )
|  | For the Three Months Ended |
|  | December 31, 2017 |  |  | September 30, 2017 |  |  | June 30, 2017 |  |  | March 31, 2017 |
Sales |  | $ | 12,807,175 |  |  | $ | 12,448,436 |  |  | $ | 13,013,143 |  |  | $ | 11,252,417 |
Gross Profit |  |  | 5,888,332 |  |  |  | 6,003,892 |  |  |  | 6,121,524 |  |  |  | 5,288,458 |
Total operating expenses |  |  | 5,418,089 |  |  |  | 5,803,260 |  |  |  | 6,248,678 |  |  |  | 4,862,979 |
Net income (loss) |  |  | 591,933 |  |  |  | 234,353 |  |  |  | (70,121 | ) |  |  | 385,090 |
Basic net loss per share |  | $ | 0.06 |  |  | $ | 0.02 |  |  | $ | (0.01 | ) |  | $ | 0.04 |
Diluted net loss per share |  | $ | 0.06 |  |  | $ | 0.02 |  |  | $ | (0.01 | ) |  | $ | 0.04 |

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109225645&loc=d3e1280-108306 + Details
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