Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 7,864	$ 6,899
Investments	8,022	18,499
Prepaid expenses and other current assets	545	1,005
Total current assets	16,431	26,403
Property and equipment, net	2,633	2,566
Intangible assets, net	4,381	4,547
Goodwill	2,791	2,791
Right-of-use assets	5,043	5,114
Other asset	562	494
Total assets	31,841	41,915
Current liabilities:
Accounts payable	1,214	1,963
Accrued expenses	2,071	2,496
Lease liability, current	98
Total current liabilities	3,383	4,459
Lease liability, less current	6,690	6,719
Total liabilities	10,073	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 – 20,869 shares and 20,825 shares at March 31, 2020 and December 31, 2019, respectively	21	21
Additional paid-in-capital	156,291	153,401
Accumulated other comprehensive income	17	4
Accumulated deficit	(134,561)	(122,689)
Total stockholders' equity	21,768	30,737
Total liabilities and stockholders' equity	$ 31,841	$ 41,915