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Face (par) amount of debt instrument at time of issuance.

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The average effective interest rate during the reporting period.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Amount of the required periodic payments including both interest and principal payments.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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The carrying value as of the balance sheet date of the current portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt.

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The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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FINANCING ARRANGEMENTS (Details)		3 Months Ended	9 Months Ended
FINANCING ARRANGEMENTS (Details)	Jul. 01, 2015 USD ($) item	Sep. 30, 2016 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)
Financing arrangements
Costs and fees related to amended credit agreement				$ 48,745
Weighted-average interest rate (as a percent)		3.00%	3.00%
Total debt		$ 6,941,929	$ 6,941,929		$ 7,636,429
Discount on Devicix Notes Payable		(112,336)	(112,336)		(142,072)
Debt Issuance Costs		(30,466)	(30,466)		(44,175)
Total debt		6,799,127	6,799,127		7,450,182
Current maturities of long-term debt		(1,559,641)	(1,559,641)		(1,495,513)
Long-term debt		5,239,486	5,239,486		5,954,669
Devicix LLC
Financing arrangements
Number of promissory notes \| item	2
Line of credit
Financing arrangements
Maximum borrowing capacity		$ 15,000,000	$ 15,000,000
Variable rate basis			three-month LIBOR
Interest rate margin on variable rate basis (as a percent)			2.25%
Interest rate (as a percent)		3.10%	3.10%
Outstanding balance		$ 8,213,268	$ 8,213,268		7,691,237
Unused availability supported by entity's borrowing base		$ 6,069,923	$ 6,069,923
Real estate term note
Financing arrangements
Variable rate basis			three-month LIBOR
Interest rate margin on variable rate basis (as a percent)			2.75%
Interest rate (as a percent)		3.60%	3.60%
Amount of annual principal payments		$ 19,000	$ 19,000
Real estate term note maturing on March 31, 2027
Financing arrangements
Debt instrument, face amount		1,800,000	1,800,000
Real estate term note 2 maturing on December 31, 2027
Financing arrangements
Debt instrument, face amount		1,700,000	1,700,000
Term loan \| Maximum
Financing arrangements
Debt instrument, face amount		1,000,000	1,000,000
Equipment term loan tied to equipment purchased in Mankato acquisition
Financing arrangements
Debt instrument, face amount		$ 2,700,000	$ 2,700,000
Industrial revenue bond payable to the City of Blue Earth, Minnesota
Financing arrangements
Interest rate (as a percent)		0.25%	0.25%
Amount of annual principal payments		$ 80,000	$ 80,000
Total debt		200,000	$ 200,000		280,000
Equipment notes maturing in May 2018
Financing arrangements
Variable rate basis			three month LIBOR
Interest rate margin on variable rate basis (as a percent)			2.75%
Amount of annual principal payments		46,000	$ 46,000
Total debt		2,648,680	2,648,680		2,633,740
Real estate term notes
Financing arrangements
Total debt		$ 2,472,945	$ 2,472,945		2,645,495
Devicix Acq Note 1, subordinate debt, due July 1, 2019
Financing arrangements
Interest rate (as a percent)		4.00%	4.00%
Total debt		$ 704,480	$ 704,480		903,128
Devicix Acq Note 2, subordinate debt, due July 1, 2019
Financing arrangements
Interest rate (as a percent)		4.00%	4.00%
Total debt		$ 915,824	$ 915,824		$ 1,174,066
Promissory note subject to offsets \| Devicix LLC
Financing arrangements
Promissory note liability	$ 1,000,000
Term of promissory note	4 years
Interest rate per annum	4.00%
Principal and interest payments	$ 22,579
Promissory note not subject to offsets \| Devicix LLC
Financing arrangements
Promissory note liability	$ 1,300,000
Term of promissory note	4 years
Interest rate per annum	4.00%
Principal and interest payments	$ 29,353