Accounts Receivable (Tables)

6 Months Ended

Mar. 31, 2019

Receivables [Abstract]

Schedule of Accounts, Notes, Loans and Financing Receivable

The components of accounts receivable consisted of the following:

	As of
(in thousands)	March 31, 2019			September 30, 2018
Accounts receivable, gross	$	20,398		$	19,823
Allowance for doubtful accounts	(267		)	(548		)
Accounts receivable, net	$	20,131		$	19,275

The following table summarizes changes in the allowance for doubtful accounts for the three and six months ended March 31, 2019 and 2018.

Allowance for Doubtful Accounts (in thousands)	For the three months ended March 31,						For the six months ended March 31,
	2019			2018			2019			2018
Balance at beginning of period	$	322		$	39		$	548		$	22
Provision adjustment - expense, net of recoveries	—			58			—			75
Write-offs and other adjustments - deductions to receivable balances	(55		)	(2		)	(281		)	(2		)
Balance at end of period	$	267		$	95		$	267		$	95