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INCOME TAXES - Reconciliation of income tax provision relative to continuing operations (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015
Effective Income Tax Rate Reconciliation, Percent [Abstract] |  |
Tax provision at U.S. statutory rate, percent | 34.00% | 34.00%
State taxes, net of federal benefit, percent | 7.50% | 7.80%
Change in valuation allowance, percent | (56.50%) | (15.70%)
Permanent differences, percent | (2.10%) | (7.30%)
Credits, percent | 2.90% | 5.50%
Other, percent | 0.10% | (3.70%)
Total income tax provision, percent | (14.10%) | 20.60%
Effective Income Tax Rate Reconciliation, Amount [Abstract] |  |
Tax provision at U.S. statutory rate, amount | $ (1,518) | $ (564)
State taxes, net of federal benefit, amount | (333) | (129)
Increase in valuation allowance | 2,518 | 261
Permanent differences, amount | 95 | 121
Credits, amount | (129) | (91)
Other, amount | (3) | 60
Total income tax provision, amount | $ 630 | $ (342)

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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32698-109319 + Details
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