SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Short-Term Investments and Invetory (Details) - USD ($)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2015
Short-term investments
Short-term investments	$ 1,766,000	$ 0
Inventories
Reserve for inventory obsolescence	11,000	7,000
Major components of inventories, net of the allowance for obsolescence
Raw materials	2,020,151	1,640,098
Work-in-progress	407,964	375,229
Finished goods	1,517,151	1,336,707
Reduction to LIFO cost	(1,314,616)	(1,232,229)
Total inventory	$ 2,630,650	$ 2,119,805
Certificates of Deposit \| Minimum
Short-term investments
Maturity period	4 months
Certificates of Deposit \| Maximum
Short-term investments
Maturity period	12 months

Represents the stated maturity period of a certificate of deposit.

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Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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Amount of difference between inventory at lower of LIFO cost or market and inventory at lower of other inventory accounting method cost or market, for example, but not limited to, FIFO or average cost.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Amount before valuation and LIFO reserves of raw materials expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount of valuation reserve for inventory.

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Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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Investments which are intended to be sold in the short term (usually less than one year or the normal operating cycle, whichever is longer) including trading securities, available-for-sale securities, held-to-maturity securities, and other short-term investments not otherwise listed in the existing taxonomy.

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