Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 5,192	$ 7,081
Marketable securities		900
Prepaid expenses and other current assets	825	194
Total current assets	6,017	8,175
Property and equipment, net	4,352	2,723
Other assets, long-term	375
Restricted cash	137	137
Total assets	10,881	11,035
Current liabilities:
Accounts payable	1,690	776
Accrued expenses	1,973	2,705
Current portion of deferred revenue	5,000
Current portion of deferred rent	42	35
Current portion of deferred lease incentive	238	111
Current portion of equipment loan		178
Total current liabilities	8,943	3,805
Accrued expenses due to Intrexon Corporation	3,040	3,040
Deferred revenue, net of current portion	5,000
Deferred rent, net of current portion	334	280
Deferred lease incentive, net of current portion	1,085	499
Warrant liability	2,155	14,679
Total liabilities	20,557	22,303
Commitments and contingencies (Note 5)
Convertible preferred stock and stockholders’ equity (deficit):
Convertible preferred stock, $0.01 par value; 30,000 shares authorized, 400.4910 and 4,605.6533 shares issued and outstanding at September 30, 2018 and December 31, 2017, respectively
Common stock, $0.01 par value; 100,000,000 shares authorized, 35,002,742 and 24,571,029 shares issued and outstanding at September 30, 2018 and December 31, 2017, respectively	221	159
Additional paid-in capital	206,115	196,760
Accumulated deficit	(216,012)	(208,187)
Total stockholders’ deficit	(9,676)	(11,268)
Total liabilities and stockholders’ deficit	$ 10,881	$ 11,035