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EARNINGS (LOSS) PER SHARE (Computation of basic and diluted earnings (loss) per share) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Earnings (loss) per share (EPS):                      
Earnings (loss) per share from continuing operations, basic and diluted $ (0.11)us-gaap_IncomeLossFromContinuingOperationsPerBasicAndDilutedShare $ (0.14)us-gaap_IncomeLossFromContinuingOperationsPerBasicAndDilutedShare $ (0.11)us-gaap_IncomeLossFromContinuingOperationsPerBasicAndDilutedShare $ (0.13)us-gaap_IncomeLossFromContinuingOperationsPerBasicAndDilutedShare $ (0.32)us-gaap_IncomeLossFromContinuingOperationsPerBasicAndDilutedShare $ (0.17)us-gaap_IncomeLossFromContinuingOperationsPerBasicAndDilutedShare $ (0.19)us-gaap_IncomeLossFromContinuingOperationsPerBasicAndDilutedShare $ (0.25)us-gaap_IncomeLossFromContinuingOperationsPerBasicAndDilutedShare $ (0.48)us-gaap_IncomeLossFromContinuingOperationsPerBasicAndDilutedShare $ (0.93)us-gaap_IncomeLossFromContinuingOperationsPerBasicAndDilutedShare $ (0.22)us-gaap_IncomeLossFromContinuingOperationsPerBasicAndDilutedShare
Earnings (loss) per share from discontinued operations, basic and diluted $ 0.19us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicAndDilutedShare $ (0.07)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicAndDilutedShare $ (0.02)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicAndDilutedShare $ (0.01)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicAndDilutedShare $ (0.03)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicAndDilutedShare $ 0.02us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicAndDilutedShare $ 0.01us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicAndDilutedShare $ 0.00us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicAndDilutedShare $ 0.08us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicAndDilutedShare $ (0.01)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicAndDilutedShare $ 0.05us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicAndDilutedShare
Earnings Per Share, Basic and Diluted $ 0.08us-gaap_EarningsPerShareBasicAndDiluted $ (0.21)us-gaap_EarningsPerShareBasicAndDiluted $ (0.13)us-gaap_EarningsPerShareBasicAndDiluted $ (0.14)us-gaap_EarningsPerShareBasicAndDiluted $ (0.35)us-gaap_EarningsPerShareBasicAndDiluted $ (0.15)us-gaap_EarningsPerShareBasicAndDiluted $ (0.18)us-gaap_EarningsPerShareBasicAndDiluted $ (0.25)us-gaap_EarningsPerShareBasicAndDiluted $ (0.40)us-gaap_EarningsPerShareBasicAndDiluted $ (0.94)us-gaap_EarningsPerShareBasicAndDiluted $ (0.17)us-gaap_EarningsPerShareBasicAndDiluted
EPS numerator - basic and diluted:                      
Income (Loss) from Continuing Operations $ (3,539)us-gaap_IncomeLossFromContinuingOperations $ (4,570)us-gaap_IncomeLossFromContinuingOperations $ (3,565)us-gaap_IncomeLossFromContinuingOperations $ (4,112)us-gaap_IncomeLossFromContinuingOperations $ (10,327)us-gaap_IncomeLossFromContinuingOperations $ (5,584)us-gaap_IncomeLossFromContinuingOperations $ (6,293)us-gaap_IncomeLossFromContinuingOperations $ (8,007)us-gaap_IncomeLossFromContinuingOperations $ (15,786)us-gaap_IncomeLossFromContinuingOperations $ (30,211)us-gaap_IncomeLossFromContinuingOperations $ (7,222)us-gaap_IncomeLossFromContinuingOperations
Income (Loss) from Discontinued Operations, Net of Taxes                 2,592us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity (184)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity 1,887us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
Net income (loss) $ 2,743us-gaap_NetIncomeLoss $ (7,019)us-gaap_NetIncomeLoss $ (4,374)us-gaap_NetIncomeLoss $ (4,544)us-gaap_NetIncomeLoss $ (11,295)us-gaap_NetIncomeLoss $ (5,047)us-gaap_NetIncomeLoss $ (5,811)us-gaap_NetIncomeLoss $ (8,242)us-gaap_NetIncomeLoss $ (13,194)us-gaap_NetIncomeLoss $ (30,395)us-gaap_NetIncomeLoss $ (5,335)us-gaap_NetIncomeLoss
EPS denominator (in thousands):                      
Weighted-average common stock outstanding - basic (in shares)                 32,843us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 32,493us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 32,600us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Common stock equivalents: stock options and other stock-based awards (a) (in shares)                 0us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements [1] 0us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements [1] 0us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements [1]
Weighted-average number of common stock outstanding - diluted (in shares)                 32,843us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 32,493us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 32,600us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
[1] For the periods in which net losses are presented, the diluted weighted average number of shares of common stock outstanding did not differ from the basic weighted average number of shares of common stock outstanding because the effects of any potential common stock equivalents (see Note 5 for further details on outstanding stock options, unvested restricted stock units and unvested restricted stock) were anti-dilutive and therefore not included in the calculation of the denominator of dilutive earnings per share.