Summary of Significant Accounting Policies - Additional Information (Details) - USD ($)	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Significant Accounting Policies [Line Items]
Minimum credit limit	30 days
Extended credit terms for trade receivables	60 days
Account receivable	$ 15,392,000	$ 12,693,000
Impairment of rental assets	$ 1,814,000
Requisite service period	1 year 6 months
Shipping and handling costs	$ 400,000	$ 600,000	$ 900,000
Maximum
Significant Accounting Policies [Line Items]
Requisite service period	4 years
Customer one
Significant Accounting Policies [Line Items]
Account receivable	$ 9,100,000
Customer Concentration Risk | Customer one | Sales Revenue, Net
Significant Accounting Policies [Line Items]
Percentage of company revenue	18.50%		26.40%
Customer Concentration Risk | No customers | Sales Revenue, Net
Significant Accounting Policies [Line Items]
Percentage of company revenue		10.00%
Current assets
Significant Accounting Policies [Line Items]
Effect of retrospective adjustment due to accounting standard update		$ (6,400,000)
Current liabilities
Significant Accounting Policies [Line Items]
Effect of retrospective adjustment due to accounting standard update		(10,000)
Non-Current deferred tax assets
Significant Accounting Policies [Line Items]
Effect of retrospective adjustment due to accounting standard update		3,000,000
Non-Current deferred tax liabilities
Significant Accounting Policies [Line Items]
Effect of retrospective adjustment due to accounting standard update		$ (3,400,000)