QUARTERLY FINANCIAL SUMMARY (UNAUDITED) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
QUARTERLY FINANCIAL SUMMARY (UNAUDITED)
Revenues	$ 48,151	$ 42,552	$ 43,380	$ 46,757	$ 37,573	$ 49,791	$ 62,563	$ 49,229	$ 180,840	$ 199,156
Gross profit (loss)	4,704	5,331	4,142	3,962	(6,208)	2,831	8,499	2,745	18,139	7,867
Operating (loss) profit	592	1,360	181	(224)	(11,025)	(2,135)	3,616	(2,364)	1,909	(11,908)
Income (loss) from continuing operations	406	1,245	42	(358)	(10,727)	(2,383)	3,387	(2,523)	1,335	(12,246)
Net (loss) income	$ 298	$ 872	$ (474)	$ (377)	$ (10,794)	$ (7,613)	$ 1,615	$ (5,015)	$ 319	$ (21,807)
(Loss) income from continuing operations per share:
Basic					$ (0.73)	$ (0.16)	$ 0.23	$ (0.17)
Diluted					(0.73)	(0.16)	0.23	(0.17)
Net (loss) income per share:
Basic	$ 0.02	$ 0.06	$ (0.03)	$ (0.03)	(0.73)	(0.52)	0.11	(0.34)	$ 0.02	$ (1.48)
Diluted	0.02	0.06	(0.03)	(0.03)	(0.73)	(0.52)	0.11	(0.34)	0.02	(1.48)
Earnings Per Share, Basic [Abstract]
Income (Loss) from Continuing Operations, Per Basic Share	0.03	0.08	0.00	(0.02)					0.09	(0.83)
Earnings Per Share, Basic	0.02	0.06	(0.03)	(0.03)	(0.73)	(0.52)	0.11	(0.34)	0.02	(1.48)
Earnings Per Share, Diluted [Abstract]
Income (Loss) from Continuing Operations, Per Diluted Share	0.03	0.08	0.00	(0.02)					0.09	(0.83)
Earnings Per Share, Diluted	$ 0.02	$ 0.06	$ (0.03)	$ (0.03)	$ (0.73)	$ (0.52)	$ 0.11	$ (0.34)	$ 0.02	$ (1.48)

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 55
-Paragraph 52
-URI http://asc.fasb.org/extlink&oid=65016374&loc=d3e4984-109258

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(19))
-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64863997&loc=d3e1252-109256

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(21))
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(23))
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882