UNION BARGAINING UNIT INTERMITTENT EMPLOYEES SEVERANCE PLAN (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Amounts recognized in the consolidated balance sheets consist of:
Accrued severance liability (non-current)	$ (311,000)	$ (713,000)
Amounts recognized in accumulated other comprehensive income (loss)
Estimated net actuarial loss	0
Intermittent Severance Benefits
Union Bargaining Unit Intermittent Employees Severance Plan
Payment period for each year worked	8 days
Eligible service period for participating in the plan	3 years
Age to be reached by employees to be eligible for payment	60 years
Change in severance obligation:
Projected benefit obligation at beginning of year	412,000	367,000	377,000
Service Cost	20,000	16,000	17,000
Interest Cost	14,000	14,000	17,000
Actuarial loss	(34,000)	15,000	11,000
Benefits paid	(31,000)		(61,000)
Settlements			6,000
Projected benefit obligation at end of year	381,000	412,000	367,000
Change in plan assets:
Fair value of plan assets at beginning of year	0	0	0
Employer contributions	31,000		61,000
Benefits paid	(31,000)		(61,000)
Fair value of plan assets at end of year	0	0	0
Amounts recognized in the consolidated balance sheets consist of:
Accrued severance liability (current)	(71,000)	(61,000)	(57,000)
Accrued severance liability (non-current)	(310,000)	(351,000)	(310,000)
Net amount recognized	(381,000)	(412,000)	(367,000)
Amounts recognized in accumulated other comprehensive income (loss)
Net actuarial (gain) loss	16,000	51,000	36,000
Components of net periodic pension cost
Service Cost	20,000	16,000	17,000
Interest Cost	14,000	14,000	17,000
Amortization of net loss	1,000
Settlement loss			6,000
Net Periodic Pension Cost	35,000	30,000	40,000
Amount recognized in accumulated other comprehensive loss during the period
Net actuarial gain (loss) recognized in other comprehensive income (loss)	35,000	(15,000)	(11,000)
Weighted average assumptions
Discount rate (as a percent)	4.60%	3.70%	4.10%
Rate of compensation increase (as a percent)	1.65%	1.65%	1.65%
Expected contribution to the plan in the next fiscal year	71,000
Benefit payments expected to be paid
2014	71,000
2015	16,000
2016	51,000
2017	15,000
2018	22,000
2019-2023	$ 172,000
Intermittent Severance Benefits | Minimum
Weighted average assumptions
Period for which yield curve of annualized individual discount rates was created in analysis	1 year
Intermittent Severance Benefits | Maximum
Weighted average assumptions
Period for which yield curve of annualized individual discount rates was created in analysis	30 years