Goodwill and Intangible Assets - Changes in Net Carrying Amount of Goodwill (Details) - USD ($)	12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Goodwill [Roll Forward]
Balance at beginning of period	$ 11,748,000	$ 16,480,000
Goodwill adjustment		(589,000)
Currency translation	422,000	21,000
Impairment adjustment	0	(4,164,000)
Balance at end of period	$ 12,170,000	$ 11,748,000