Supplemental Balance Sheet Information

3 Months Ended

Mar. 31, 2018

Property and equipment, net



	March 31, 2018			December 31, 2017
Scientific equipment	$	1,906		$	1,797
Leasehold improvements	192			192
Furniture and fixtures	31			31
Computers and software	26			26
Construction in process	38			120
Property and equipment, gross	2,193			2,166
Less: accumulated depreciation	(918		)	(849		)
Property and equipment, net	$	1,275		$	1,317

Depreciation and amortization expense was $86 and $38 for the three months ended March 31, 2018 and 2017, respectively.

Accrued expenses and other current liabilities



	March 31, 2018		December 31, 2017
Accrued legal expenses	514		251
Accrued payroll-related expenses	329		718
Other accrued expenses	422		304
Accrued expenses and other current liabilities	$	1,265	$	1,273