Note 9 – Significant Customers

Revenue for the three months ended June 30, 2020 and 2019 was $3.6 million and $1.7 million, respectively. Three third-party contract manufacturing customers accounted for 58.7%, 16.6% and 12.2%, respectively, of our revenue for the three months ended June 30, 2020. Two third-party contract manufacturing customers accounted for 67.2% and 21.1%, respectively, of our revenue for the three months ended June 30, 2019. The loss of sales to any of these large third-party contract manufacturing customers could have a material adverse effect on our business operations and financial condition.

Revenue for the six months ended June 30, 2020 and 2019 was $5.5 million and $4.0 million, respectively. Two third-party contract manufacturing customers accounted for 55.2% and 17.1%, respectively, of our revenue for the six months ended June 30, 2020. Two third-party contract manufacturing customers accounted for 54.8% and 22.8%, respectively, of our revenue for the three months ended June 30, 2019. The loss of sales to any of these large third-party contract manufacturing customers could have a material adverse effect on our business operations and financial condition.

We are subject to account receivable credit concentrations from time-to-time as a consequence of the timing, payment pattern and ultimate purchase volumes or shipping schedules with our customers. These concentrations may impact our overall exposure to credit risk, either positively or negatively, in that our customers may be similarly affected by changes in economic, regulatory or other conditions that may impact the timing and collectability of amounts due to us. Two customers represented 72.4% and 12.8% of our total trade receivable balances at June 30, 2020 and three customers represented 70%, 14% and 11% of our total trade receivable balances at December 31, 2019.