On Wednesday its share price peaked at 8.5p, up by more than 50% on Mondays starting price of 5.62p.
In a statement issued on Wednesday, the firm said that it was not aware of any matter that should be disclosed to the market in respect of the rise.
Since then its share price has fallen steadily to 6.25p.
In early April, the group sold its loss-making direct mail arm, Stream GWC, to Formpro Mail Marketing for 1.
Since mid February, the firms share price has been slowly rising from 3.25p, hovering around the 5.5p mark for the past two weeks.
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