Debt - Narrative (Details) - USD ($)	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018	May 14, 2020	May 13, 2020
Line Of Credit Facility [Line Items]
Revolving credit facility outstanding amount		$ 34,650,000
Amortization of financing fees	$ 1,606,000	276,000	$ 315,000
Borrowings under revolving credit facility		34,650,000
Pre-Petition ABL Credit Agreement
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	$ 180,000,000			$ 130,000,000	$ 180,000,000
Revolving credit facility maturity date	Jan. 29, 2024
Term of credit facility (in years)	5 years
Loan repayment requirement	$ 10,000,000
Unencumbered cash balances in excess	32,000,000
Revolving credit facility outstanding amount	100,000	34,700,000
Availability under the credit facility	0	65,000,000
Outstanding letters of credit		11,500,000
Interest expense		2,500,000	2,100,000
Commitment fees		500,000	400,000
Interest expense, debt		1,700,000	1,300,000
Amortization of financing fees		300,000	$ 400,000
Borrowings under revolving credit facility	100,000	$ 34,700,000
DIP ABL Facility
Line Of Credit Facility [Line Items]
Revolving credit facility outstanding amount	0
Availability under the credit facility	33,000,000
Outstanding letters of credit	8,800,000
Borrowings under revolving credit facility	$ 0
DIP ABL Facility | Maximum
Line Of Credit Facility [Line Items]
Maturity period	180 days