FEDERAL AND STATE CURRENT AND DEFERRED INCOME TAX - Difference Between Income Taxes at the Federal Statutory Rate and Effective Tax Rate (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Federal income tax (provision) benefit at statutory rate	$ (2,421)	$ 697
Change in valuation allowance	3,038	529
State taxes, net of federal benefit	(6)	0
Expired credits	(614)	(1,056)
Other	3	(223)
Total income tax provision	$ 0	$ (53)

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets.

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The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to tax credits. Including, but not limited to, research credit, foreign tax credit, investment tax credit, and other tax credits.

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