INCOME TAXES	6 Months Ended
Jun. 30, 2019
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES We record the benefit we will derive in future accounting periods from tax losses and credits and deductible temporary differences as “deferred tax assets.” We record a valuation allowance to reduce the carrying value of our net deferred tax assets if, based on all available evidence, it is more likely than not that some or all of the deferred tax assets will not be realized. Since 2009, we have maintained a valuation allowance to fully reserve our deferred tax assets. We recorded a full valuation allowance in 2009 because we determined there was not sufficient positive evidence regarding our potential for future profits to outweigh the negative evidence of our three-year cumulative loss position at that time. We expect to continue to maintain a full valuation allowance until we determine that we can sustain a level of profitability that demonstrates our ability to realize these assets. To the extent we determine that the realization of some or all of these benefits is more likely than not based upon expected future taxable income, a portion or all of the valuation allowance will be reversed. Such a reversal would be recorded as an income tax benefit and, for some portion related to deductions for stock option exercises, an increase in shareholders’ equity. As of June 30, 2019, we have a net deferred tax liability of $10.0 thousand for the taxable differences related to our indefinite-lived intangible assets when calculating our valuation allowance due to the unpredictability of the reversal of these differences.

INCOME TAXES

We record the benefit we will derive in future accounting periods from tax losses and credits and deductible temporary differences as “deferred tax assets.” We record a valuation allowance to reduce the carrying value of our net deferred tax assets if, based on all available evidence, it is more likely than not that some or all of the deferred tax assets will not be realized. Since 2009, we have maintained a valuation allowance to fully reserve our deferred tax assets. We recorded a full valuation allowance in 2009 because we determined there was not sufficient positive evidence regarding our potential for future profits to outweigh the negative evidence of our three-year cumulative loss position at that time. We expect to continue to maintain a full valuation allowance until we determine that we can sustain a level of profitability that demonstrates our ability to realize these assets. To the extent we determine that the realization of some or all of these benefits is more likely than not based upon expected future taxable income, a portion or all of the valuation allowance will be reversed. Such a reversal would be recorded as an income tax benefit and, for some portion related to deductions for stock option exercises, an increase in shareholders’ equity.

As of June 30, 2019, we have a net deferred tax liability of $10.0 thousand for the taxable differences related to our indefinite-lived intangible assets when calculating our valuation allowance due to the unpredictability of the reversal of these differences.