We issued convertible promissory notes pursuant to that certain Securities Purchase Agreement entered into in September 2016, as amended (the "September Notes"), with an aggregate principal amount of $5,771,000 as of December 31, 2016 and $8,771,000 as of March 31, 2017. On March 24, 2017, the Company entered into an amendment to the Securities Purchase Agreement which amended each of notes and warrants held by the noteholders and requires the us to comply with new financial covenants, including that we maintain a positive Working Capital (as defined in the Securities Purchase Agreement) as of each month end and average cash on hand at least equal to the largest payroll during the preceding 90 days (subject to certain adjustments), and requires the Company to provide regular financial reports to the noteholders. If we are unable to maintain such working capital or cash levels, we would be in default of the September Notes, and the noteholders would be entitled to the remedies thereunder including, but not limited to, accelerated repayment thereof.
If the noteholders collectively, or individually, call for redemption prior to maturity or prior to converting the notes into common stock, we may not have the cash resources to repay the notes. If we were unable to redeem the September Notes by raising additional capital, which might not be available on favorable terms, if at all, the noteholders could cause the Company to take extreme measures, including reduction of operations and personnel, sale of assets such as our intellectual property assets, and/or declaring bankruptcy. Any of these actions would have a material adverse effect on the Company.
If we are successful in selling IPSA, the noteholders have a one-time option to partially redeem up to 50% of the Outstanding Amount (as defined in the Agreement) if cash proceeds received by us in connection with the sales of IPSA exceed certain threshold levels.