Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2016	Sep. 30, 2015
Accounts receivable, allowances	$ 14,812	$ 6,298
Common stock (voting), par value	$ 0.01	$ 0.01
Common stock (voting), shares authorized	100,000,000	100,000,000
Common stock (voting), issued	59,890,885	49,790,743
Common Stock (voting), outstanding	59,890,885	49,790,743
Undesignated Preferred Stock, shares authorized	5,000,000	5,000,000
Undesignated Preferred Stock, issued	0	0
Undesignated Preferred Stock, outstanding	0	0