Income Taxes - Schedule of Calculation of the Effective Tax Rate (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Jun. 30, 2020	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Income before income taxes	$ 2,922			$ 5,886			$ 15,810	$ 4,315
Income tax provision (benefit)	(559)			797			2,133	963
Net income	$ 3,481	$ 7,421	$ 2,775	$ 5,089	$ 958	$ (2,695)	$ 13,677	$ 3,352
Effective tax rate	(19.00%)			14.00%			13.00%	22.00%