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The developments reflect the company’s fast fall from prominence. In 2010, the company’s president, David Vieau, predicted “thousands of jobs” in the greater Detroit area.

The Washington Times reported in October, however, that federal job-tracking figures show that just a few hundred jobs were created before A123 joined a growing list of energy companies that received lots of federal money only to end up in bankruptcy.

According to federal records, slightly more than 400 jobs were created, though Energy Department officials said the government job-tracking data didn’t include many other positions that were created.

In the wake of the company’s bankruptcy this year, Mr. Thune and Mr. Grassley raised questions in a letter to the Energy Department about whether federal officials knew the company was in trouble.

A123 has been struggling for some time,” they wrote. “Was the company struggling when the Energy Department decided to award it a federal grant?”