I know Agoracom is far more on top of real info than I am used to so I apologise if this has already been discussed.

From the prospectus:

False Claims Act Investigation

POET may be subject to liability under the federal False Claims Act ("FCA"). The FCA prohibits individuals and companies from knowingly submitting false claims for payments to, or improperly retaining overpayments from, the government. In September 2016 POET received a letter from the U.S. Attorney's Office for the District of Northern Ohio indicating that POET was under investigation for potential violations of the FCA related to the Small Business Innovation Research program grants received by ODIS Inc., a subsidiary of POET, from the United States Government in 2008. POET is co-operating with the investigation. The estimated potential liability for POET is approximately US$900,000.