Consolidated Balance Sheets (Unaudited) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 31,379,000	$ 20,800,000
Marketable securities, short term	0	18,413,000
Accounts receivable	610,000
Restricted cash, short-term		50,000
Prepaid expenses and other current assets	1,001,000	1,347,000
Total current assets	32,990,000	40,610,000
Property and equipment, net	2,031,000	2,781,000
Operating lease right-of-use	6,656,000
Deposits	2,589,000	1,013,000
Restricted cash, long term	150,000	150,000
Other long term assets	793,000	809,000
Total assets	45,209,000	45,363,000
Current liabilities:
Accounts payable	1,178,000	2,035,000
Accrued expenses	1,555,000	1,788,000
Research and development contract liability, current portion	3,225,000	2,012,000
Deferred rent		381,000
Operating lease liability, current portion	4,434,000
Total current liabilities	10,392,000	6,216,000
Research and development contract liability, net of current portion	5,185,000	5,175,000
Operating lease liability, net of current portion	2,610,000
Total liabilities	18,187,000	11,391,000
Stockholders’ equity:
Preferred Stock, $0.001 par value; 10,000,000 shares authorized and 0 shares issued and outstanding at September 30, 2019 and December 31, 2018
Common stock, $0.001 par value; 50,000,000 shares authorized; 22,969,966 and 20,697,453 shares issued and outstanding, at September 30, 2019 and December 31, 2018, respectively	23,000	21,000
Additional paid in capital	126,582,000	105,763,000
Accumulated other comprehensive loss		(11,000)
Accumulated deficit	(99,583,000)	(71,801,000)
Total stockholders’ equity	27,022,000	33,972,000
Total liabilities and stockholders’ equity	$ 45,209,000	$ 45,363,000