This has been discussed many times before. Companies run deficits until they develop products and create a market for those products. In the Medical Device Industry the average cost to develop a device and get it FDA Cleared for one Medical Indication is $30 million.
BIEL is FDA Cleared for 5 Indications and has an Accumulated Deficit of $38 million. This demonstrates that BIEL has been very conservative with their spending compared to other Medical Device companies.
As far as the "Forgiving interest" being a "very small concession", you must live in a far better zip code than I do if you feel $2.5 million is a "very small concession".
FYI, the loans that mature in 2023 total less than that $2.5 million that BIEL saved on Interest and the majority of these loans are held by 'friendly lenders' who have 'Rolled Over' loans in the past.