Quarterly report pursuant to Section 13 or 15(d)

Income Taxes

Income Taxes
6 Months Ended
Jun. 30, 2022
Income Tax Disclosure [Abstract]  
Income Taxes Income TaxesDuring the six months ended June 30, 2022, we recorded income tax expense of $293, resulting in an effective tax rate of (0.17)%, which is primarily a result of current state income taxes. Our current income tax expense was partially offset by a deferred tax benefit resulting from a reduction to deferred tax liabilities originally created through our April 2, 2021 acquisition of Rent. Our June 30, 2021 effective tax rate of 7.35% is primarily a result of our previously recorded full valuation allowance against our deferred tax assets.
In determining the realizability of the net U.S. federal and state deferred tax assets, we consider numerous factors including historical profitability, estimated future taxable income, prudent and feasible tax planning strategies, and the industry in which we operate. Management reassesses the realization of the deferred tax assets each reporting period, which resulted in a valuation allowance against the full amount of our U.S. deferred tax assets for the six months ended June 30, 2022 and 2021. To the extent that the financial results of our U.S. operations improve in the future and the deferred tax assets become realizable, we will reduce the valuation allowance through earnings.

Under Sections 382 and 383 of the Internal Revenue Code of 1986, as amended, substantial changes in our ownership may limit the amount of net operating loss ("NOL") and income tax credit carryforwards that could be utilized annually in the future to offset taxable income and income tax liabilities. Any such annual limitation may significantly reduce the utilization of the NOLs and income tax credits before they expire. A Section 382 limitation study performed as of March 31, 2017 determined that we experienced an ownership change in 2006 with $1,506 of the 2006 NOL and $32 of the 2006 research and development tax credit unavailable for future use. Furthermore, in connection with our acquisition of Rent., Rent. experienced an ownership change that triggered Section 382. As of September 30, 2021, Rent. completed a Section 382 limitation study and, based on this analysis, we do not expect a reduction in our ability to fully utilize Rent.'s pre-change NOLs.

As of December 31, 2021, we had accumulated approximately $611,296 of federal net operating losses, approximately $18,777 (tax effected) of state net operating losses, and approximately $3,213 of foreign net operating losses. Federal net operating losses are available to offset federal taxable income and begin to expire in 2025, with net operating loss carryforwards of $320,123 generated after 2017 available to offset future U.S. federal taxable income over an indefinite period.

Net research and development credit carryforwards of $18,828 are available as of December 31, 2021 to reduce future liabilities. The research and development credit carryforwards begin to expire in 2026.

Deductible but limited federal business interest expense carryforwards of $149,710 are available as of December 31, 2021 to offset future U.S. federal taxable income over an indefinite period.

Our material income tax jurisdiction is the United States (federal) and Canada (foreign). As a result of NOL carryforwards, we are subject to audit for all tax years for federal purposes. All tax years remain subject to examination in various other jurisdictions that are not material to our consolidated financial statements.