Stock-Based Compensation (Summarized Stock Option Activity) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Stock-Based Compensation [Abstract]
Outstanding, Number of shares, Beginning Balance	809,274	846,607	846,607
Granted, Number of shares	600,000
Forfeitures, Number of shares	(200,000)	(37,333)
Outstanding, Number of shares, Ending Balance	1,209,274	809,274	809,274	846,607
Exercisable, Number of Shares	609,274
Vested and expected to vest, Number of shares	1,209,274
Outstanding, Weighted average exercise price, Beginning Balance	$ 13.99	$ 13.87	$ 13.87
Granted, Weighted average exercise price	6.20
Forfeitures, Weighted average exercise price	24.46	11.23
Outstanding, Weighted average exercise price, Ending Balance	8.41	$ 13.99	$ 13.99	$ 13.87
Exercisable, Weighted average exercise price	10.56
Vested and expected to vest, Weighted average exercise price	$ 8.41
Outstanding, Weighted average remaining contractual term (in years)	6 years 7 months 2 days	3 years 4 months 24 days	2 years 8 months 1 day	3 years 9 months 18 days
Granted, Weighted average remaining contractual term (in years)	10 years
Exercisable, Weighted average remaining contractual term (in years)	3 years 2 months 19 days
Vested and expected to vest, Weighted average remaining contractual term (in years)	6 years 7 months 2 days
Outstanding, Aggregate intrinsic value, Beginning Balance	$ 370	$ 486	$ 486
Granted, Aggregate intrinsic value	1,212
Outstanding, Aggregate intrinsic value, Ending Balance	$ 1,322	$ 468	$ 370	$ 486
Outstanding, Weighted average grant date fair value, Beginning Balance	$ 4.20	$ 4.21	$ 4.21
Granted, Weighted average grant date fair value	2.02
Forfeitures, Weighted average grant date fair value	7.17	4.55
Outstanding, Weighted average grant date fair value, Ending Balance	$ 2.62	$ 4.20	$ 4.20	$ 4.21
Vested and expected to vest, Aggregate intrinsic value	$ 1,322
Exercisable, Aggregate intrinsic value	$ 242