Management had set August 14 as the day the positions would end.

The immersive art company will shut its Boston space on August 30.

The museum says Timothy Spurchise was dismissed for cause and calls his union activity "completely irrelevant."

The museum challenged the eligibility of roughly 100 ballots after the January election.

The case was one of nearly 400 the labor board's general counsel pulled out of its New York region weeks before it was dismissed.

The watchdog changed the report's disposition from a declined criminal prosecution to a declined civil-enforcement action on August 3.

The NLRB told workers behind the charges that a record caseload could delay them, and one has been open for over 15 months.

Thirty-six full- and part-time staff at the Amherst museum are organizing with UAW Local 2110.