Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 37,765	$ 6,899
Investments		18,499
Prepaid expenses and other current assets	907	1,005
Total current assets	38,672	26,403
Property and equipment, net	2,591	2,566
Intangible assets, net	4,214	4,547
Goodwill	2,791	2,791
Right-of-use assets	9,749	5,114
Other assets	365	494
Total assets	58,382	41,915
Current liabilities:
Accounts payable	1,489	1,963
Accrued expenses	3,123	2,496
Lease liability, current	278
Total current liabilities	4,890	4,459
Lease liability, less current portion	11,164	6,719
Total liabilities	16,054	11,178
Commitments and contingencies (Note 8)
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 – 25,149 shares and 20,825 shares at June 30, 2020 and December 31, 2019, respectively	25	21
Additional paid-in-capital	188,197	153,401
Accumulated other comprehensive income (loss)		4
Accumulated deficit	(145,894)	(122,689)
Total stockholders' equity	42,328	30,737
Total liabilities and stockholders' equity	$ 58,382	$ 41,915