Footnotes to GAAP to Non-GAAP Reconciliation
(A) Stock-based compensation. Included in our GAAP presentation of cost of revenue and operating expenses, stock-based compensation consists of expenses for stock options, stock unit awards and purchase rights under our stock purchase plan. We exclude stock-based compensation expense from our non-GAAP measures because some investors may view it as not reflective of our core operating performance as it is a non-cash expense.
(B) Amortization of internally developed software. Included in our GAAP presentation of cost of revenue and operating expenses, amortization of internally developed software reflects non-cash expense for software developed or obtained for internal use. We exclude these expenses from our non-GAAP measures because we believe they are not indicative of our core operating performance.
(C) Restructuring and other related costs. Included in our GAAP presentation, we incurred expenses related to our restructuring effort to better align our cost structure with current revenue levels. Restructuring and other related costs consist primarily of employees' severance payments, related employee benefits, related legal fees and charges related to leases and other contract termination costs. These are one-time in nature costs that are not indicative of our core operating performance.
(D) Amortization of contract acquisition costs - ASC 606 initial adoption. Upon adoption of ASC 606 using the modified retrospective approach, we capitalized approximately $3.3 million of previously expensed sales commissions from 2015, 2016 and 2017. Amortization of these amounts are included in our GAAP presentation as sales and marketing expense. We believe the non-cash amortization expense is not related to or indicative of our ongoing operating performance.
(E) Litigation reserve. The Company records a contingent liability when it is probable that a loss has been incurred and the amount is reasonably estimable in accordance with accounting for contingencies. These reserves are one-time in nature charges that are not indicative of our core operating performance.
(F) Loss on disposal of fixed assets and other, net. Included in our GAAP presentation of general and administrative expense, loss on disposal of fixed assets and other, net consists of expense recognized related to the disposal of fixed assets and other lease related assets driven by the shift to a virtual-first operating model. We exclude these expenses from our non-GAAP measures because we believe they are not indicative of our core operating performance.
(G) Non-cash interest expense. Under GAAP, we recognize interest expense at the effective interest rate which includes interest costs related to the amortization of debt issuance costs. The difference between the effective interest rate and the contractual interest rate is excluded from our assessment of our operating performance because we believe this non-cash expense is not indicative of ongoing operating performance. We believe that the exclusion of the non-cash interest expense provides investors a view of our core operating performance.
(H) Income tax effect on non-GAAP adjustments. This adjusts the provision for income taxes to reflect the effect of the non-GAAP items A, B, C, D, E and F noted above on our non-GAAP net income (loss).
(I) Shares used in calculating diluted net income (loss) per share on a non-GAAP basis. The share count for basic and diluted earnings per share is the same due to GAAP net losses for the three months ended December 31, 2020 and for the years ended December 31, 2021 and 2020. For the three months ended December 31, 2021 the share count for diluted earnings per share is the weighted-average number of shares of common stock outstanding during the period increased to include the number of additional shares of common stock that would have been outstanding if the potentially dilutive securities had been issued.
