Acquisition of Confluence (Tables) - Confluence

9 Months Ended

Sep. 30, 2018

Business Acquisition [Line Items]

Schedule of consideration transferred

Cash consideration paid	$	10,269
Aclaris common stock issued		9,675
Contingent consideration		4,378
Total fair value of consideration to Confluence equity holders	$	24,322

Schedule of pro forma information

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2018		2017		2018		2017
Revenue	$	1,628	$	1,063	$	6,422	$	3,366
Gross profit		435		298		3,081		1,102
Total operating expenses		33,885		18,736		99,457		48,122
Net loss		(32,740)		(17,875)		(94,187)		(45,627)