INCENTIVE PLANS (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	May 31, 2017	Nov. 30, 2010	May 03, 2005
Stock Options
Incentive plans
Compensation expense (income)	$ 126,000	$ 43,000
Unrecognized compensation related to unvested awards	$ 160,000
Unrecognized compensation, vesting period	4 years 18 days
Options
Balance at the beginning of the period(in shares)	187,750	37,750
Granted (in shares)	134,000	150,000
Cancelled (in shares)	(97,000)
Balance at the end of the period (in shares)	224,750	187,750	37,750
Exercisable at the end of the period (in shares)	44,750
Weighted-Average Exercise Price Per Share
Outstanding at the beginning of the period (in dollars per share)	$ 3.70	$ 4.75
Granted (in dollars per share)	3.36	3.43
Cancelled (in dollars per share)	(3.84)
Outstanding at the end of the period (in dollars per share)	3.44	$ 3.70	$ 4.75
Exercisable at the end of the period (in dollars per share)	$ 3.65
Weighted- Average Remaining Contractual Term (in years)
Outstanding at the end of the period	8 years 7 months 6 days	8 years 1 month 17 days
Exercisable at the end of the period	6 years 7 months 2 days
Aggregate Intrinsic Value
Outstanding at the end of the period	$ 52,715	$ 74,070
Exercisable at the end of the period	8,075
Additional disclosures
Intrinsic value of options exercised	$ 0	$ 0
Stock Options | Minimum
Incentive plans
Purchase price as a percentage of market value	100.00%
Exercisable period	1 year
Stock Options | Maximum
Incentive plans
Expiration term	10 years
2003 Plan | Stock Options
Incentive plans
Number of shares eliminated						172,500
2005 Plan | Stock Options
Incentive plans
Shares available for grant	0					200,000
Options
Granted (in shares)		0	0
2010 Plan | Equity Appreciation Rights Plan
Incentive plans
Compensation expense (income)	$ 0	$ (22,000)
Equity Appreciation Rights Plan
Vesting period from the base date	3 years
Shares granted (in units)		100,000	31,666
Accrued compensation liability
Beginning Balance		$ 45,000
Reductions		(22,000)
Payments		$ (23,000)
Ending Balance			$ 45,000
2010 Plan | Equity Appreciation Rights Plan | Maximum
Incentive plans
Number of common shares authorized					1,000,000
Equity Appreciation Rights Plan
Redemption cash payment period	90 days
2017 Plan | Stock Options
Incentive plans
Number of common shares authorized				350,000
Options
Granted (in shares)	134,000	150,000