Accounts Receivable

3 Months Ended

Dec. 31, 2017

Receivables [Abstract]

Accounts Receivable

Accounts Receivable

The components of accounts receivable consisted of the following:

	As of			As of
(in thousands)	December 31, 2017			September 30, 2017
Accounts receivable, gross	$	23,169		$	22,287
Allowance for doubtful accounts	(39		)	(22		)
Accounts receivable, net	$	23,130		$	22,265

The allowance for doubtful accounts is based on the age of receivables and a specific identification of receivables considered at risk of collection.

The following table summarizes changes in the allowance for doubtful accounts for the three months ended December 31, 2017 and 2016.

Allowance for Doubtful Accounts (in thousands)	For the three months ended December 31,
	2017		2016
Balance at beginning of period	$	22	$	36
Provision adjustment - expense, net of recoveries	17		—
Write-offs and other adjustments - deductions to receivable balances	—		(3		)
Balance at end of period	$	39	$	33