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Provision for Income Taxes | 12 Months Ended
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Dec. 31, 2019
Income Tax Disclosure [Abstract] |
Provision for Income Taxes | Note 10: Provision for Income Taxes The provision for income taxes differs from the amount expected by applying the federal statutory rate to the loss before taxes as follows:
|  | Year Ended December 31, |
|  | 2019 |  |  | 2018 |
Federal statutory income tax rate |  |  | 21.00 | % |  |  | 21.00 | %
Non-deductible expenses and other |  |  | (1.35 | )% |  |  | (1.54 | )%
Change in valuation allowance |  |  | (19.65 | )% |  |  | (19.46 | )%
Total |  |  | 0.00 | % |  |  | 0.00 | %
As of December 31, 2019 and 2018, the components of the Company’s deferred tax assets are as follows (in thousands):
|  | Year Ended December 31, |
|  | 2019 |  |  | 2018 |
Deferred tax assets: |  |  |  |  |  |  |  |
Federal and state net operating loss carryforwards |  | $ | 30,049 |  |  | $ | 16,076 |
Research and development credits carryforwards |  |  | 8,077 |  |  |  | 5,087 |
Depreciation |  |  | 6,052 |  |  |  | 3,942 |
Deferred Revenue |  |  | 3,277 |  |  |  | 3,909 |
Other |  |  | 2,965 |  |  |  | 1,724 |
Total deferred tax assets |  |  | 50,420 |  |  |  | 30,738 |
Less valuation allowance |  |  | (50,420 | ) |  |  | (30,738 | )
Net deferred tax assets |  | $ | - |  |  | $ | - |
Deferred income taxes reflect the net tax effects of (a) temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes, and (b) operating losses and tax credit carryforwards. The Company’s accounting for deferred taxes involves the evaluation of a number of factors concerning the realizability of its net deferred tax assets. The Company primarily considered such factors as its history of operating losses, the nature of the Company’s deferred tax assets, and the timing, likelihood and amount, if any, of future taxable income during the periods in which those temporary differences and carryforwards become deductible. At present, the Company does not believe that it is more likely than not that the deferred tax assets will be realized; accordingly, a full valuation allowance has been established and no deferred tax asset is shown in the accompanying consolidated balance sheets. The valuation allowance increased by approximately $19.7 million and 12.2 million, respectively, for the years ended December 31, 2019 and 2018. At December 31, 2019, the Company has total net operating loss carryforwards (NOLs) of $137.1 million for federal income tax purposes, of which approximately $47.4 million begin to expire in 2035 and approximately $89.7 million that have no expiration date and federal research tax credits of approximately $6.1 million that begin to expire in 2035. The Company also has state NOLs of approximately $16.9 million that begin to expire in 2035, and state research tax credits of approximately $5.0 million that have no expiration date. Use of the NOLs and credit carryforwards may be subject to a substantial annual limitation due to the ownership change provisions of U.S. tax law, as defined in Section 382 and 383 of the Internal Revenue Code of 1986, as amended, and similar state provisions. The annual limitation may result in the expiration of NOLs and credits before use. The Company determined that an ownership change occurred in 2015 in conjunction with its Series A Preferred Stock financing and in 2017 in conjunction with its Series C Preferred Stock financing but does not expect that these ownership changes will result in the expiration of any the NOLs prior to utilization. The Company has not been audited by the Internal Revenue Service, any state or foreign tax authority. The Company is subject to taxation in the United States and also beginning in 2017, in Australia. Because of the net operating loss and research credit carryforwards, all of the Company’s tax years, from 2015 to 2018, remain open to U.S. federal and California state tax examinations. In addition, the Company’s tax years from 2017 to 2018 are open to examination in Australia. There were no interest or penalties accrued at December 31, 2019 or 2018. Uncertain Tax Positions The Company follows the provisions of FASB Accounting Standards Codification (ASC 740-10), Accounting for Uncertainty in Income Taxes. ASC 740-10 prescribes a comprehensive model for the recognition, measurement, presentation and disclosure in financial statements of uncertain tax positions that have been taken or expected to be taken on a tax return. No liability related to uncertain tax positions is recorded in the consolidated financial statements. The Company’s reserve for unrecognized tax benefits is approximately $2.2 million and $1.1 million at December 31, 2019 and 2018, respectively. Due to the full valuation allowance at December 31, 2019 and 2018, current adjustments to the unrecognized tax benefit will have no impact on the Company’s effective income tax rate; any adjustments made after the valuation allowance is released will have an impact on the tax rate. A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows (in thousands):
|  | Year Ended December 31, |
|  | 2019 |  |  | 2018 |
Beginning balance |  | $ | 1,084 |  |  | $ | 622 |
Additions (decreases) for tax positions taken in a prior year |  |  | (7 | ) |  |  | 8 |
Additions for tax positions taken in current year |  |  | 1,088 |  |  |  | 454 |
Ending balance |  | $ | 2,165 |  |  | $ | 1,084 |
The Company does not anticipate material changes to its uncertain tax positions through the next 12 months.

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- Definition The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -URI http://asc.fasb.org/topic&trid=2144680 + Details
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