The heart device maker and heart education company, Artivion, faced a serious data breach in late November.

A recent SEC posting revealed that it was hacked on Nov. 21. The breach hasn’t caused the company any major financial problems, nor is it likely to. Still, it caused some temporary problems in its daily operations. It has caused some near-term disruption with its order and shipping processes.

After discovering the breach, Artivion quickly brought down some of its systems to contain the threat. It immediately employed its cybersecurity experts to analyze the quarantined files.

While there is no official evidence yet, the attack has all the markings of a ransomware attack with the goal of encrypting Artivion’s files. The company stated that it suffered an attack that relied on data “acquisition and encryption,” but didn’t specifically name ransomware as the cause. There is no telling how many files were encrypted or how much data was stolen.

“The company continues to provide its products and services to customers, but the incident has caused disruptions to some order and shipping processes, as well as to certain corporate operations, which have largely been mitigated,” the SEC filing reads. “The company has and will continue to incur expenses related to its response to this incident, and the company believes it has adequate insurance coverage.” The exact costs for remediation are unknown.

“However, the company believes that it will incur additional costs that will not be covered by insurance. The company remains subject to various risks due to the incident, including the impact of delays in restoration, and, as a result, cannot provide assurances that the incident will not be determined to have a material impact in the future.”

Artivion has already brought down its impacted systems and is working on restoring them.