In the preparation of the Company’s consolidated financial statements, management calculates income taxes based upon the estimated effective rate applicable to operating results for the full fiscal year. This includes estimating the current tax liability as well as assessing differences resulting from different treatment of items for tax and book accounting purposes. These differences result in deferred tax assets and liabilities, which are

recorded on the balance sheet. Management analyzes these assets and liabilities regularly and assesses the likelihood that deferred tax assets will be recovered from future taxable income.

At June 30, 2021 there was $117,000 of net uncertain tax benefit positions that would reduce the effective income tax rate if recognized. The Company records interest and penalties related to income taxes as income tax expense in the condensed consolidated statements of loss and comprehensive loss.

The Company is subject to U.S. federal income tax as well as income tax of multiple state and foreign jurisdictions. The tax years 2017-2020 remain open to examination by the Internal Revenue Service and the years 2016-2020 remain open to examination by various state tax departments. The tax years from 2017-2020 remain open in Costa Rica.

The Company’s effective income tax rate was (0.0%) for the first six months of 2021. The effective tax rate differs from the federal tax rate of 21% due to state income taxes, foreign tax rate differences, foreign losses not deductible for U.S. income tax purposes, the effect of uncertain income tax positions, stock compensation windfalls and changes in valuation allowances related to deferred tax assets. The foreign operating losses may ultimately be deductible in the countries in which they occurred; however, the Company has not recorded a deferred tax asset for these losses due to uncertainty regarding the eventual realization of the benefit. The effect of the foreign operations was an overall rate decrease of approximately 0.5% for the six months ended June 30, 2021. There were no additional uncertain tax positions identified in the first six months of 2021. The Company's effective income tax rate for the six months ended June 30, 2020 was 0.2%, and differed from the federal tax rate due to state income taxes, foreign tax rate differences, foreign losses not deductible for U.S. income tax purposes, changes in the reserve for uncertain income tax positions, provisions for interest charges for uncertain income tax positions, stock compensation windfalls and changes in valuation allowances related to deferred tax assets.