Consolidated Balance Sheets - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 69,724,000	$ 66,841,000
Short term investments	37,078,000	66,979,000
Prepaid expenses and other current assets	4,871,000	4,042,000
Total current assets	111,673,000	137,862,000
Property and equipment, net	263,000	427,000
Operating lease right-of-use assets, net	1,165,000	674,000
Long term investments	19,933,000	50,464,000
Other assets	194,000	39,000
Total assets	133,228,000	189,466,000
Current liabilities:
Accounts payable	4,911,000	3,555,000
Accrued expenses and other current liabilities	9,311,000	13,441,000
Total current liabilities	14,222,000	16,996,000
Long-term operating lease liabilities	420,000	208,000
Total liabilities	14,642,000	17,204,000
Commitments and contingencies (See Note 7)
Stockholders’ equity:
Preferred stock, $0.001 par value, 10,000,000 authorized, no shares issued and outstanding as of December 31, 2021 and 2020, respectively
Common stock, $0.001 par value, 100,000,000 shares authorized, 30,074,412 and 29,543,222 issued and outstanding as of December 31, 2021 and 2020, respectively	30,000	29,000
Additional paid in capital	355,234,000	318,574,000
Accumulated other comprehensive income (loss)	(79,000)	313,000
Accumulated deficit	(236,599,000)	(146,654,000)
Total stockholders’ equity	118,586,000	172,262,000
Total liabilities and stockholders’ equity	$ 133,228,000	$ 189,466,000