The Company has historically provided financial terms to customers in accordance with what management views as industry norms. Access to the Company’s software products usually requires immediate payment but can extend several months under certain circumstances. Management periodically and regularly reviews customer account activity in order to assess the adequacy of allowances for doubtful accounts, considering such factors as economic conditions and each customer’s payment history and creditworthiness. If the financial condition of our customers were to deteriorate, or if they were otherwise unable to make payments in accordance with management’s expectations, we might have to increase our allowance for doubtful accounts, modify their financial terms and/or pursue alternative collection methods.

Revenue concentrations for the years ended December 31, 2019 and 2018, and the accounts receivables concentrations at December 31, 2019 and 2018 are as follows: