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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Reclassifications, A/R, Inventories, Property and Equipment (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016
Restricted Cash |  |
Outstanding letters of credit | $ 0 |
Restricted Cash | 305,683 | $ 0
Accounts Receivable and Allowance for Doubtful Accounts |  |
Accounts Receivable Allowances | 209,000 | 883,000
Inventories |  |
Raw materials | 13,870,006 | 14,533,690
Work in process | 3,112,407 | 4,104,968
Finished goods | 2,388,496 | 2,688,596
Reserves | (844,187) | (673,413)
Total | 18,526,722 | 20,653,841
Property and Equipment |  |
Accumulated Depreciation | (26,312,628) | (24,524,750)
Total Property and Equipment, net | 10,175,533 | 10,330,834
Land |  |
Property and Equipment |  |
Property and equipment | 359,500 | 375,000
Building and Leasehold Improvements |  |
Property and Equipment |  |
Property and equipment | $ 8,826,802 | 9,393,092
Buildings |  |
Property and Equipment |  |
Estimated useful lives | 39 years |
Leasehold improvements | Minimum |  |
Property and Equipment |  |
Estimated useful lives | 3 years |
Leasehold improvements | Maximum |  |
Property and Equipment |  |
Estimated useful lives | 15 years |
Manufacturing equipment |  |
Property and Equipment |  |
Property and equipment | $ 21,267,133 | 19,632,033
Manufacturing equipment | Minimum |  |
Property and Equipment |  |
Estimated useful lives | 3 years |
Manufacturing equipment | Maximum |  |
Property and Equipment |  |
Estimated useful lives | 7 years |
Office and other equipment |  |
Property and Equipment |  |
Property and equipment | $ 6,034,726 | $ 5,455,459
Office and other equipment | Minimum |  |
Property and Equipment |  |
Estimated useful lives | 3 years |
Office and other equipment | Maximum |  |
Property and Equipment |  |
Estimated useful lives | 7 years |

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