Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2016	Sep. 30, 2015
Statement of Financial Position [Abstract]
Current portion of long-term debt (stated principal amount)	$ 3,914	$ 2,024
Principal amount of long-term debt	$ 24,700	$ 27,000
Members' capital, par value
Members' capital, units issued	25,410,851	25,410,851
Members' capital, units outstanding	25,410,851	25,410,851