Shares of Irvine healthcare software maker Quality Systems Inc. fell in afternoon trading Monday after the company warned of an impairment charge to its Hospital Solutions Division as a result of disappointing performance.

Quality announced the news Friday after market close.

The company was trading down about 8% to a market value of $1.16 billion.

The impairment charge is expected to be recorded in its December quarter and would come from the $30 million in long-term assets the division has.

Quality said it now expects its December quarter results to come in below analyst estimates.