Accounts Receivable

6 Months Ended

Mar. 31, 2017

Receivables [Abstract]

Accounts Receivable

Accounts Receivable

The components of accounts receivable consisted of the following:

	As of			As of
(in thousands)	March 31, 2017			September 30, 2016
Accounts receivable, gross	$	17,424		$	18,468
Allowance for doubtful accounts	(13		)	(36		)
Accounts receivable, net	$	17,411		$	18,432

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 and six months ended March 31, 2017 and 2016.

Allowance for Doubtful Accounts (in thousands)	For the three months ended March 31,						For the six months ended March 31,
	2017			2016			2017			2016
Balance at beginning of period	$	33		$	325		$	36		$	462
Provision adjustment - expense, net of recoveries	7			—			7			4
Write-offs and other adjustments - additions (deductions) to receivable balances	(27		)	(222		)	(30		)	(363		)
Balance at end of period	$	13		$	103		$	13		$	103