(CNN) Michael Flynn is still cooperating with the Justice Department, and it will delay his sentencing for another several months.

President Donald Trump's first national security adviser's "cooperation is fully ongoing," his attorney Sidney Powel l said in court Monday, putting to rest at least some speculation about Flynn's relationship with a Justice Department that those around him have criticized.

The Texas-based lawyer said Flynn is still planning to testify at the trial of his former lobbying partner Bijan Kian next month.

Powell will then need months to review the documents in Flynn's case before his sentencing, she said.

Prosecutors and Flynn's new legal team will provide the court with another status report on Flynn at the end of August.

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