pre_text: The tax effects of temporary differences that give rise to the Company’s deferred tax assets and liabilities are as follows: As of December 31, 2019 and 2018, the Company had federal net operating loss carryforwards (“NOL”) of approximately $7,161,000 and $6,617,000, respectively. The
  losses expire beginning in 2024. The Company has not performed a detailed analysis to determine whether an ownership change under IRC Section 382 has occurred. The effect
  of an ownership change would be the imposition of annual limitation on the use of NOL carryforwards attributable to periods before the change Any limitation may result in
  expiration of a portion of the NOL before utilization. As of December 31, 2019 and 2018, the Company had state and local net operating loss carryforwards of approximately
  $7,153,000 and $6,609,000, respectively, to reduce future state tax liabilities also through 2035. As of December 31, 2019 and 2018, the Company had Canadian NOL of approximately $1,111,000 and $1,070,000, respectively. The Canadian losses expire in stages
  beginning in 2026. As of December 31, 2019 and 2018, the Company also has unclaimed Canadian federal scientific research and development investment tax credits, which are
  available to reduce future federal taxes payable of approximately $0 and $0 respectively.
  As of December 31, 2019 and 2018, the Company had Canadian NOL of approximately $1,111,000 and $1,070,000, respectively. The Canadian losses expire in stages beginning in 2026. As of December 31, 2019 and 2018, the Company also has unclaimed Canadian federal scientific research and development investment tax credits, which are available to reduce future federal taxes payable of approximately $0 and $0 respectively. As of December 31, 2019 and 2018, the Company had Canadian NOL of approximately $1,111,000 and $1,070,000, respectively. The Canadian losses expire in stages beginning in 2026. As of December 31, 2019 and 2018, the Company also has unclaimed Canadian federal scientific research and development investment tax credits, which are available to reduce future federal taxes payable of approximately $0 and $0 respectively. As of December 31, 2019 and 2018, the Company had Canadian NOL of approximately $1,111,000 and $1,070,000, respectively. The Canadian losses expire in stages beginning in 2026. As of December 31, 2019 and 2018, the Company also has unclaimed Canadian federal scientific research and development investment tax credits, which are available to reduce future federal taxes payable of approximately $0 and $0 respectively. As a result of losses and uncertainty of future profit, the net deferred tax asset has been fully reserved. The net change in the valuation allowance during the years
  ended December 31, 2019 and 2018 was an increase of $661,000 and $457,000, respectively Foreign earnings are assumed to be permanently reinvested. U.S. Federal income taxes have not been provided on undistributed earnings of our foreign subsidiary. The Company recognizes interest and penalties related to uncertain tax positions in selling, general and administrative expenses. The Company has not identified any
  uncertain tax positions requiring a reserve as of December 31, 2019 and 2018. The Company is required to file U.S. federal and state income tax returns. These returns are subject to audit by tax authorities beginning with the year ended December 31, 2014.
table: 2019 2018
table: U.S. net operating loss carryforwards 2,894,000 2,627,000
table: Stock compensation 784,000 359,000
table: Canadian Provincial income tax losses 29,000 56,000
table: Canadian Provincial scientific investment tax credits (4,000) -
table: 3,703,000 3,042,000
table: Valuation allowance (3,703,000) (3,042,000)
table: Net deferred tax assets - -
question: Analyse this data from a financial earnings document. What is the change in stock compensation between 2018 and 2019?