A United States citizen charged with subversion in Zimbabwe and accused of insulting President, Robert Mugabe as a 'selfish and sick man' on Twitter should be freed on $1,000 bail, a judge ordered Thursday.

Martha O'Donovan also must hand over her passport and report to police twice a week. The New Jersey native will return to court on Nov. 15.

The 25-year-old O'Donovan faces up to 20 years in prison if convicted on the subversion charge.  She also faces a charge of undermining the authority of or insulting the president, which carries up to a year in prison. 

O'Donovan, who was arrested on Friday, has denied the charges as 'baseless and malicious.'