Accounts Receivable (Tables)

6 Months Ended

Mar. 31, 2018

Receivables [Abstract]

Schedule of Accounts, Notes, Loans and Financing Receivable

The components of accounts receivable consisted of the following:

	As of			As of
(in thousands)	March 31, 2018			September 30, 2017
Accounts receivable, gross	$	17,862		$	22,287
Allowance for doubtful accounts	(95		)	(22		)
Accounts receivable, net	$	17,767		$	22,265

The following table summarizes changes in the allowance for doubtful accounts for the three and six months ended March 31, 2018 and 2017.

Allowance for Doubtful Accounts (in thousands)	For the three months ended March 31,						For the six months ended March 31,
	2018			2017			2018			2017
Balance at beginning of period	$	39		$	33		$	22		$	36
Provision adjustment - expense, net of recoveries	58			7			75			7
Write-offs and other adjustments - deductions to receivable balances	(2		)	(27		)	(2		)	(30		)
Balance at end of period	$	95		$	13		$	95		$	13