Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 51,103	$ 3,386
Investments	8,480	34,683
Prepaid expenses and other current assets	779	412
Total current assets	60,362	38,481
Property and equipment, net	2,173	2,570
Intangible assets, net	5,213	5,878
Goodwill	2,791	2,791
Other asset	101	101
Total assets	70,640	49,821
Current liabilities:
Accounts payable	1,272	782
Accrued expenses	1,421	1,034
Deferred rent, current	415	397
Total current liabilities	3,108	2,213
Deferred rent, less current	1,198	1,613
Total liabilities	4,306	3,826
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 – 20,593 shares and 16,819 shares at December 31, 2018 and 2017, respectively	21	17
Additional paid-in-capital	142,032	84,202
Accumulated other comprehensive loss	(1)	(51)
Accumulated deficit	(75,718)	(38,173)
Total stockholders' equity	66,334	45,995
Total liabilities and stockholders' equity	$ 70,640	$ 49,821