PROPERTY AND EQUIPMENT (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 21,431	$ 21,394
Accumulated depreciation and amortization	(17,866)	(17,682)
Property, Plant and Equipment, Net	3,565	3,712
Machinery and equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	11,022	10,997
Computers and other [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	7,110	7,106
Aquifer [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	482	482
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	1,518	1,518
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 1,299	$ 1,291