Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 10,780	$ 51,103
Investments	31,862	8,480
Prepaid expenses and other current assets	1,908	779
Total current assets	44,550	60,362
Property and equipment, net	1,985	2,173
Intangible assets, net	4,880	5,213
Goodwill	2,791	2,791
Right of use asset	1,182
Other asset	1,645	101
Total assets	57,033	70,640
Current liabilities:
Accounts payable	1,577	1,272
Accrued expenses	1,703	1,421
Deferred rent, current		415
Lease liability, current	168
Total current liabilities	3,448	3,108
Deferred rent, less current		1,198
Lease liability, less current	3,724
Total liabilities	7,172	4,306
Commitments and contingencies (Note 10)
Stockholders' equity:
Preferred stock, $0.001 par value; authorized – 50,000 shares; no shares issued and outstanding
Common stock, $0.001 par value: authorized – 500,000 shares; issued and outstanding – 20,768 shares and 20,593 shares at June 30, 2019 and December 31, 2018, respectively	21	21
Additional paid-in-capital	146,973	142,032
Accumulated other comprehensive income (loss)	22	(1)
Accumulated deficit	(97,155)	(75,718)
Total stockholders' equity	49,861	66,334
Total liabilities and stockholders' equity	$ 57,033	$ 70,640