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Share-Based Compensation - Restricted Stock Activity (Details) - USD ($)	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Jun. 30, 2019
Restricted Stock
Number of Restricted Stock [Roll Forward]
Shares Awarded, Beginning balance (in shares)	32,056
Restricted stock granted (in shares)	7,370
Shares Awarded, Exercised/Released (in shares)	0
Shares Awarded, Cancelled/Forfeited (in shares)	(757)
Shares Awarded, Ending balance (in shares)	38,669
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Weighted Average Grant Date Fair Value, Beginning balance (in US$ per share)	$ 21.10
Restricted stock granted, weighted average grant date fair value (in US$ per share)	13.56
Weighted Average Grant Date Fair Value, Exercised/Released (in US$ per share)	0.00
Weighted Average Grant Date Fair Value, Cancelled/Forfeited (in US$ per share)	31.70
Weighted Average Grant Date Fair Value, Ending balance (in US$ per share)	$ 20.22
Performance-Based Restricted Stock Units (PBRSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense recognized	$ 32,900	$ 82,000
Unrecognized compensation cost related to restricted stock	700,000		$ 300,000
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to restricted stock	300,000
General and Administrative Expense \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense recognized	$ 103,000