Stock-Based Compensation (Summarized Stock Option Activity) (Details) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended		12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Stock-Based Compensation [Abstract]
Outstanding, Number of shares, Beginning Balance	864,579	809,274	809,274
Granted, Number of shares	561,000	600,000
Forfeitures, Number of shares		(200,000)
Outstanding, Number of shares, Ending Balance	1,425,579	1,209,274	864,579	809,274
Exercisable, Number of Shares	523,914
Vested and expected to vest, Number of shares	1,425,579
Outstanding, Weighted average exercise price, Beginning Balance	$ 7.81	$ 13.99	$ 13.99
Granted, Weighted average exercise price	3.07	6.2
Forfeitures, Weighted average exercise price		24.46
Outstanding, Weighted average exercise price, Ending Balance	5.94	$ 8.41	$ 7.81	$ 13.99
Exercisable, Weighted average exercise price	8.86
Vested and expected to vest, Weighted average exercise price	$ 5.94
Outstanding, Weighted average remaining contractual term (in years)	7 years 9 months 21 days	6 years 1 month 24 days	7 years 18 days	2 years 8 months 1 day
Granted, Weighted average remaining contractual term (in years)	10 years	10 years
Exercisable, Weighted average remaining contractual term (in years)	5 years 6 months 7 days
Vested and expected to vest, Weighted average remaining contractual term (in years)	7 years 9 months 21 days
Outstanding, Aggregate intrinsic value, Beginning Balance	$ 0	$ 370	$ 370
Granted, Aggregate intrinsic value	676	1,212
Outstanding, Aggregate intrinsic value, Ending Balance	$ 365	$ 72	$ 0	$ 370
Outstanding, Weighted average grant date fair value, Beginning Balance	$ 2.62	$ 4.2	$ 4.2
Granted, Weighted average grant date fair value	1.2	2.02
Forfeitures, Weighted average grant date fair value		7.17
Outstanding, Weighted average grant date fair value, Ending Balance	$ 2.07	$ 2.62	$ 2.62	$ 4.2