Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 8,536	$ 51,103
Investments	44,265	8,480
Prepaid expenses and other current assets	550	779
Total current assets	53,351	60,362
Property and equipment, net	2,056	2,173
Intangible assets, net	5,046	5,213
Goodwill	2,791	2,791
Other asset	208	101
Total assets	63,452	70,640
Current liabilities:
Accounts payable	1,200	1,272
Accrued expenses	1,519	1,421
Deferred rent, current		415
Lease liability, current	396
Total current liabilities	3,115	3,108
Deferred rent, less current		1,198
Lease liability, less current	1,223
Total liabilities	4,338	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 – 20,710 shares and 20,593 shares at March 31, 2019 and December 31, 2018, respectively	21	21
Additional paid-in-capital	144,887	142,032
Accumulated other comprehensive income (loss)	2	(1)
Accumulated deficit	(85,796)	(75,718)
Total stockholders' equity	59,114	66,334
Total liabilities and stockholders' equity	$ 63,452	$ 70,640