Summary of Significant Accounting Policies - Stock-Based Compensation (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended
Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Effect on income before income taxes	$ (351)	$ (296)	$ (1,059)	$ (864)
Effect on income taxes	47	40	145	134
Effect on net income	$ (304)	$ (256)	$ (914)	$ (730)
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding at beginning of period (in shares)			1,627,477	1,063,324
Granted (in shares)			350,075	327,500
Assumed - merger (in shares)			0	367,229
Exercised (in shares)			(9,846)	(94,454)
Forfeited (in shares)			(129,430)	(26,571)
Outstanding at end of period (in shares)	1,838,276	1,637,028	1,838,276	1,637,028
Exercisable at end of period (in shares)	1,128,320	1,005,690	1,128,320	1,005,690
Weighted average fair value of options granted during the period (usd per share)			$ 3.04	$ 5.91
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding at beginning of period, Weighted Average Exercise Price (usd per share)			9.11	7.37
Granted, Weighted Average Exercise Price (usd per share)			5.25	9.74
Assumed - merger, Weighted Average Exercise Price (usd per share)			0.00	14.19
Exercised, Weighted Average Exercise Price (usd per share)			3.46	5.51
Forfeited, Weighted Average Exercise Price (usd per share)			12.87	29.48
Outstanding at end of period, Weighted Average Exercise Price (usd per share)	$ 8.16	$ 9.12	8.16	9.12
Exercisable at end of period, Weighted Average Exercise Price (usd per share)	$ 8.91	$ 9.75	$ 8.91	$ 9.75
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Risk free interest rate			2.00%	2.00%
Expected life			6 years	6 years
Dividend rate			0.00%	0.00%
Volatility			63.00%	67.00%
Stock Options \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option expiration period			10 years
Option vesting period			4 years
Stock Options \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option vesting period			6 months
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Beginning Outstanding (in shares)			13,540	35,203
Released (in shares)			(13,540)	(21,663)
Ending Outstanding (in shares)	0	13,540	0	13,540
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Beginning Outstanding, Weighted Average Grant Date Fair Value (usd per share)			$ 7.98	$ 10.13
Released, Weighted Average Grant Date Fair Value (usd per share)			7.98	11.47
Ending Outstanding, Weighted Average Grant Date Fair Value (usd per share)	$ 0.00	$ 7.98	$ 0.00	$ 7.98
Restricted Stock \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option vesting period			4 years
Restricted Stock \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option vesting period			2 years

Share-based Compensation Arrangement by Share-based Payment Award, Options, Assumed In Merger

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Share-based Compensation Arrangements by Share-based Payment Award, Options, Assumed In Merger, Weighted Average Exercise Price

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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The amount of expense, net of income tax, recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Gross number of share options (or share units) granted during the period.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of share options (or share units) exercised during the current period.

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