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Property and Equipment - Summary of Property and Equipment (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Property and equipment, gross | $ 3,152,886 | $ 3,014,487
Less accumulated depreciation and amortization | (2,968,259) | (2,838,716)
Total | $ 184,627 | 175,771
Minimum [Member] |  |
Estimated useful life | 3 years |
Maximum [Member] |  |
Estimated useful life | 7 years |
Machinery and Equipment [Member] |  |
Property and equipment, gross | $ 2,596,170 | $ 2,495,959
Machinery and Equipment [Member] | Minimum [Member] |  |
Estimated useful life | 5 years | 5 years
Machinery and Equipment [Member] | Maximum [Member] |  |
Estimated useful life | 7 years | 7 years
Furniture and Fixtures [Member] |  |
Property and equipment, gross | $ 267,712 | $ 248,709
Furniture and Fixtures [Member] | Minimum [Member] |  |
Estimated useful life | 3 years | 3 years
Furniture and Fixtures [Member] | Maximum [Member] |  |
Estimated useful life | 5 years | 5 years
Leasehold Improvements [Member] |  |
Property and equipment, gross | $ 289,004 | $ 269,819
Leasehold Improvements [Member] | Minimum [Member] |  |
Estimated useful life | 5 years | 5 years
Leasehold Improvements [Member] | Maximum [Member] |  |
Estimated useful life | 7 years | 7 years

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- Definition Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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