COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Thousands		12 Months Ended
	May 27, 2016	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015	Aug. 31, 2015
Commitments And Contingencies [Line Items]
Loss Contingency Accrual		$ 105		$ 109
Asset retirement obligation:
Asset Retirement Obligation, Current		78		142
Asset Retirement Obligations, Noncurrent		1,693		1,820
Total asset retirement obligations		$ 1,771		$ 1,962
Management [Member]
Commitments And Contingencies [Line Items]
Length Of Agreements With Consultants, Key Management, And Others		one year
Chief Executive Officer [Member]
Commitments And Contingencies [Line Items]
Supplemental Unemployment Benefits, Severance Benefits			$ 747
Loss Contingency, Estimate of Possible Loss					$ 2,000
Increase (Decrease) in Postemployment Obligations	$ 1,800
Legal Fees	$ 700
Postemployment Benefits, Period Expense		$ 3,025