I believe they got the $5M revolving line of credit from TCA to grow the business.
They got two installments in 2015 and then rolled over that balance into a third installment in 2016. The total loan then became $1,674,484
Some posters claim that they've talked to the company and they said they are paying that loan monthly. But there is no way to verify that until we see the financial filings.
From Arrayit twitter feed:
Arrayit Corporation @arrayit 24 Dec 2015
Arrayit 2.0 featuring $5M credit facility should be able to grow $20M revenues, $2-3M earnings, $60-90M cap and NASDAQ listing. All aboard!!