Commitments and Contingencies - Additional Information (Detail) - USD ($)	1 Months Ended	3 Months Ended	9 Months Ended
	May 31, 2017	Mar. 31, 2018	Mar. 31, 2018
Contingencies And Commitments [Line Items]
Loss incurred during period			$ 0
Restructuring expenses		$ 1,500,000
General and Administrative Expenses [Member]
Contingencies And Commitments [Line Items]
Accelerated stock compensation expense		$ 200,000
Warranty Claim [Member]
Contingencies And Commitments [Line Items]
Recovery of claims	$ 1,269,000