Summary of Significant Accounting Policies - Stock-Based Compensation (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			9 Months Ended
	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 400		$ 400	$ 978	$ 1,059
Stock Options
Options
Outstanding at beginning of period (in shares)		1,841,567		1,841,567	1,627,477
Granted (in shares)				145,000	350,075
Exercised (in shares)				(149,301)	(9,846)
Forfeited (in shares)				(107,480)	(129,430)
Outstanding at end of period (in shares)	1,729,786		1,838,276	1,729,786	1,838,276
Exercisable at end of period (in shares)	1,191,876		1,128,320	1,191,876	1,128,320
Weighted average fair value of options granted during the period (usd per share)				$ 3.04	$ 3.04
Weighted Average Exercise Price
Outstanding at beginning of period, Weighted Average Exercise Price (usd per share)		$ 8.15		8.15	9.11
Granted, Weighted Average Exercise Price (usd per share)				5.23	5.25
Exercised, Weighted Average Exercise Price (usd per share)				5.99	3.46
Forfeited, Weighted Average Exercise Price (usd per share)				12.68	12.87
Outstanding at end of period, Weighted Average Exercise Price (usd per share)	$ 7.82		$ 8.16	7.82	8.16
Exercisable at end of period, Weighted Average Exercise Price (usd per share)	$ 8.38		$ 8.91	$ 8.38	$ 8.91
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%	63.00%
Stock Options | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option vesting period				6 months
Stock Options | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option expiration period		10 years
Option vesting period				4 years
Restricted Stock
Awards
Beginning Outstanding (in shares)		0		0	13,540
Released (in shares)				0	(13,540)
Ending Outstanding (in shares)	0		0	0	0
Weighted Average Grant Date Fair Value
Beginning Outstanding (usd per share)		$ 0.00		$ 0.00	$ 7.98
Released (usd per share)				0.00	7.98
Ending Outstanding (usd per share)	$ 0.00		$ 0.00	$ 0.00	$ 0.00