2019
2018
Net loss
$(1,934,133)
$(3,016,750)
Interest (income) expense, net
53,139
(13,622)
Income tax provision (benefit)
(100,363)
9,623
Depreciation and amortization
66,082
67,107
EBITDA
(1,915,275)
(2,953,642)
Adjustments:
Stock-based compensation
7,261
6,404
Adjusted EBITDA
$(1,908,014)
$(2,947,238)
non-gaap financial measures .
management believes that certain non-gaap financial measures may be useful to investors in certain instances to provide additional meaningful comparisons between current results and results in prior operating periods .
adjusted earnings before interest taxes depreciation amortization and stock-based compensation - “ adjusted ebitda ” is a metric used by management and frequently used by the financial community .
adjusted ebitda from operations provides insight into an organization ’ s operating trends and facilitates comparisons between peer companies since interest taxes depreciation amortization and stock-based compensation can differ greatly between organizations as a result of differing capital structures and tax strategies .
adjusted ebitda from operations is one of the measures used for determining our debt covenant compliance .
adjusted ebitda from operations excludes certain items that are unusual in nature or not comparable from period to period .
while management believes that non-gaap measurements are useful supplemental information such adjusted results are not intended to replace our gaap financial results .
adjusted ebitda from operations is not and should not be considered an alternative to net income -loss operating income -loss or any other measure for determining operating performance or liquidity as determined under accounting principles generally accepted in the united states -gaap .
in assessing the overall health of its business for the years ended december 31 2019 and 2018 the company excluded items in the following general categories described below : .
stock-based compensation : the company believes that because of the variety of equity awards used by companies varying methodologies for determining stock-based compensation and the assumptions and estimates involved in those determinations the exclusion of non-cash stock-based compensation enhances the ability of management and investors to understand the impact of non-cash stock-based compensation on our operating results .
further the company believes that excluding stockbased compensation expense allows for a more transparent comparison of its financial results to the previous year .
reconciliation of net loss to adjusted ebitda for the years ended december 31 .
liquidity and capital resources .
for the year ended december 31 2019 the company reported a net loss of $ 1934133 and had cash used in operating activities of $ 1875846 and ended the year with an accumulated deficit of $ 125105539 and total current assets in excess of current liabilities of $ 4187449 .
at december 31 2019 the company had $ 3300600 of cash and approximately $ 424000 of availability on its credit facility .
the credit facility is a $ 2000000 line of credit which is subject to a borrowing base calculation based on the company ’ s eligible accounts receivable and eligible inventory each- multiplied by an applicable advance rate with an overall limitation tied to the company ’ s eligible accounts receivable .
as of december 31 2019 we had borrowing capacity of $ 1102917 and an outstanding balance of $ 624347 resulting in the approximate availability of $ 424000 on the credit facility .
during the twelve-month period between january 1 2019 and december 31 2019 the company ’ s cash balance decreased from $ 4678891 to $ 3300600 or approximately $ 115000 per month .
in comparison during the twelve-month period between january 1 2018 and december 31 2018 the company ’ s cash balance decreased from $ 8385595 to $ 4678891 or approximately $ 309000 per month .
this improvement is the result of improved revenues and cost management efforts .

Question: What is adjusted EBITDA?
Answer: Adjusted earnings before interest, taxes, depreciation, amortization and stock-based compensation