FINANCING ARRANGEMENTS (Details)		9 Months Ended	12 Months Ended
	Jul. 01, 2015 USD ($) item	Sep. 30, 2017 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Jun. 15, 2017 USD ($)
Financing arrangements
Loss on Extinguishment of Debt				$ 175,000
Total long-term debt			$ 4,612,000	5,657,000
Discount on Devicix Notes Payable			(23,000)	(63,000)
Debt Issuance Costs			(185,000)	(238,000)
Long-term Debt			4,404,000	5,356,000
Current maturities of long-term debt			(780,000)	(1,003,000)
Long-term debt - net of current maturities			3,624,000	4,353,000
Future maturity requirements for long-term debt
2019			857,000
2020			498,000
2021			498,000
2022			2,759,000
Total long-term debt			$ 4,612,000	5,657,000
Devicix, LLC
Financing arrangements
Number of promissory notes | item	2
Line of credit
Financing arrangements
Weighted-average interest rate (as a percent)			4.80%
Outstanding balance			$ 9,264,000	8,503,000
Unused availability supported by entity's borrowing base			$ 6,137,000	4,231,000
Devicix Acq Note 1, subordinate debt, due July 1, 2019
Financing arrangements
Interest rate (as a percent)			4.00%
Long-term Debt			$ 156,000	394,000
Devicix Acq Note 2, subordinate debt, due July 1, 2019
Financing arrangements
Interest rate (as a percent)			4.00%
Long-term Debt			$ 203,000	$ 512,000
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	$ 23,000
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	$ 29,000
Bank of America | Line of credit
Financing arrangements
Maximum borrowing capacity					$ 16,000,000
Bank of America | Real estate term notes
Financing arrangements
Debt instrument, face amount					$ 5,000,000
Variable rate basis			one-month LIBOR
Interest rate margin on variable rate basis (as a percent)			2.25%
Interest rate (as a percent)			4.80%	4.50%
Long-term Debt			$ 4,253,000	$ 4,751,000
Principal and interest payments			$ 41,000
Bank of America | Credit Agreement
Financing arrangements
Minimum fixed charge coverage ratio			1.0
Minimum level of cumulative EBITDA			$ 1,970,000
Wells Fargo Bank, N.A.
Financing arrangements
Loss on Extinguishment of Debt		$ 175,000