Accounts Receivable (Tables)

9 Months Ended

Sep. 30, 2014

Receivables [Abstract]

Accounts Receivable

	September 30, 2014			December 31, 2013
	(in thousands)
Accounts receivable	$	54,919		$	39,256
Less:  Allowance for doubtful accounts	(134		)	(193		)
Total, net	$	54,785		$	39,063

Allowance for Doubtful Accounts

	Three months ended					Nine months ended
	September 30, 2014			September 30, 2013		September 30, 2014			September 30, 2013
Allowance for doubtful accounts:	(in thousands)
Balance, beginning of period	$	185		$	154	$	193		$	52
Provisions for losses on accounts receivables	(51		)	19		(66		)	121
Accounts receivable written off, net of recoveries	—			—		7			—
Balance, end of period	$	134		$	173	$	134		$	173