FINANCING AGREEMENTS (Details)		12 Months Ended
	Jul. 01, 2015 USD ($) item	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Financing arrangements
Weighted-average interest rate (as a percent)		2.80%	2.80%
Total debt		$ 7,636,429	$ 4,805,341
Discount on Devicix Notes Payable		(142,072)
Debt Issuance Costs		(44,175)
Total debt		7,450,182	4,805,341
Current maturities of long-term debt		(1,495,513)	(732,835)
Long-term debt - net of current maturities		5,954,669	4,072,506
Future maturity requirements for long-term debt
2016		1,495,513
2017		1,521,580
2018		2,265,317
2019		628,791
2020		230,067
Future		1,495,161
Total debt		7,636,429	4,805,341
Line of credit
Financing arrangements
Maximum borrowing capacity		$ 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)		2.70%
Outstanding balance		$ 7,691,237	$ 7,998,184
Minimum fixed charge coverage ratio		1.20
Minimum fixed charge coverage ratio thereafter		1.15
Unused availability supported by entity's borrowing base		$ 6,100,000
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)		3.20%
Amount of monthly principal payments		$ 19,000
Real estate term note maturing on March 31, 2027
Financing arrangements
Debt instrument, face amount		1,800,000
Real estate term note expiring on May 31, 2012
Financing arrangements
Debt instrument, face amount		1,700,000
Term loan
Financing arrangements
Long-term debt - net of current maturities		218,000
Term loan | Maximum
Financing arrangements
Debt instrument, face amount		1,000,000
Term loan maturing on May 31, 2018
Financing arrangements
Debt instrument, face amount		1,000,000
Equipment loan maturing on May 31, 2018
Financing arrangements
Debt instrument, face amount		2,700,000
Industrial revenue bond payable to the City of Blue Earth, Minnesota
Financing arrangements
Interest rate (as a percent)			0.24%
Amount of annual principal payments		80,000
Total debt		$ 280,000	$ 360,000
Equipment notes maturing in May 2015
Financing arrangements
Variable rate basis		three-month LIBOR
Interest rate margin on variable rate basis (as a percent)		2.75%
Amount of monthly principal payments		$ 46,000
Total debt		$ 2,633,740	1,569,781
Real estate term notes
Financing arrangements
Variable rate basis		three-month LIBOR
Total debt		$ 2,645,495	$ 2,875,560
Devicix Acq Note 1, subordinate debt, due July 1, 2019
Financing arrangements
Interest rate (as a percent)		4.00%
Total debt		$ 903,128
Devicix Acq Note 2, subordinate debt, due July 1, 2019
Financing arrangements
Interest rate (as a percent)		4.00%
Total debt		$ 1,174,066
Devicix LLC
Financing arrangements
Number of promissory notes | item	2
Devicix LLC | Promissory note subject to offsets
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
Devicix LLC | Promissory note not subject to offsets
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