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Related Party Transactions	12 Months Ended
Related Party Transactions	Sep. 30, 2017
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions We have a $10 million investment in convertible preferred stock of a private company. The company is developing a range of products focused on revenue cycle activities for hospitals and healthcare providers. Related party revenue was immaterial for the years ended September 30, 2017, 2016 and 2015. The accounts receivable balance from this company was not significant as of September 30, 2017 and 2016.