Note 5. Income Taxes	6 Months Ended
Jun. 30, 2019
Income Tax Disclosure [Abstract]
Income Taxes	We recognized income tax expense of $33,000 and $46,000 for the three and six-month periods ended June 30, 2019, compared to $224,000 and $214,000 during the same periods of 2018, respectively. At the end of each interim period, we estimate the effective tax rate we expect to be applicable for the full fiscal year and this rate is applied to our results for the year-to-date period, and then adjusted for any discrete period items. For the three and six-month periods ended June 30, 2019 and 2018, the variance between the Company’s effective tax rate and the U.S. statutory rate of 21% is primarily attributable to stock-based compensation tax (shortfall)/benefit of ($11,000) and $24,000, respectively, recognized in income tax expense during the periods, as well as, tax credits offset by state income taxes. For the three- month period ended June 30, 2018, the variance between the U.S. statutory rate and the Company’s effective rate is primarily attributable to additional expense as a result of a tax shortfall associated with stock-based compensation in the amount of $68,000, offset by foreign statutory rate differentials and tax credits. For the six-month period ended June 30, 2018, the Company’s effective tax rate was in-line with the statutory rate plus additional state taxes.

Note 5. Income Taxes

6 Months Ended

Jun. 30, 2019

We recognized income tax expense of $33,000 and $46,000 for the three and six-month periods ended June 30, 2019, compared to $224,000 and $214,000 during the same periods of 2018, respectively. At the end of each interim period, we estimate the effective tax rate we expect to be applicable for the full fiscal year and this rate is applied to our results for the year-to-date period, and then adjusted for any discrete period items. For the three and six-month periods ended June 30, 2019 and 2018, the variance between the Company’s effective tax rate and the U.S. statutory rate of 21% is primarily attributable to stock-based compensation tax (shortfall)/benefit of ($11,000) and $24,000, respectively, recognized in income tax expense during the periods, as well as, tax credits offset by state income taxes. For the three- month period ended June 30, 2018, the variance between the U.S. statutory rate and the Company’s effective rate is primarily attributable to additional expense as a result of a tax shortfall associated with stock-based compensation in the amount of $68,000, offset by foreign statutory rate differentials and tax credits. For the six-month period ended June 30, 2018, the Company’s effective tax rate was in-line with the statutory rate plus additional state taxes.