Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 90,173	$ 77,833
Prepaid expenses and other current assets	2,544	3,176
Total current assets	92,717	81,009
Property and equipment, net	8,002	8,341
Right of use asset - operating lease	11,616
Other assets	1,570	1,570
Total assets	113,905	90,920
Current liabilities:
Accounts payable	3,439	620
Accrued expenses	7,986	8,758
Operating lease liability, current portion	1,788
Other current liabilities	395	365
Total current liabilities	13,608	9,743
Noncurrent liabilities:
Long-term debt	19,806	19,634
Operating lease liability, net of current portion	10,982
Deferred rent, net of current portion		1,148
Other noncurrent liabilities	303	198
Total liabilities	44,699	30,723
Commitments and contingencies
Stockholder’s equity:
Preferred stock, $0.001 par value; 10,000,000 shares authorized; no shares issued or outstanding at June 30, 2020 and December 31, 2019, respectively	0	0
Common stock, $0.001 par value; 200,000,000 shares authorized; 46,173,415 and 32,232,258 shares issued and 46,136,643 and 32,170,605 shares outstanding at June 30, 2020 and December 31, 2019, respectively	46	32
Additional paid-in capital	311,706	259,018
Accumulated deficit	(242,546)	(198,853)
Total stockholders’ equity	69,206	60,197
Total liabilities and stockholders’ equity	$ 113,905	$ 90,920