Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 52,100	$ 34,012
Short-term investments	73,776	127,159
Prepaid expenses and other current assets	3,078	3,829
Total current assets	128,954	165,000
Property and equipment, net	51	73
In-process R&D	10,656	11,274
Other non-current assets	116	251
Total assets	139,777	176,598
Current liabilities:
Accounts payable	1,334	1,443
Accrued expenses and other current liabilities	4,533	4,884
Current portion of long-term debt		8,333
Total current liabilities	5,867	14,660
Long-term liabilities:
Long-term debt	26,078	17,323
Other long-term liabilities	54	117
Total liabilities	31,999	32,100
Commitments and contingencies (Note 11)
Stockholders’ equity:
Common stock, $0.001 par value, 300,000,000 shares authorized as of December 31, 2022 and 2021, respectively; 114,046,345 and 114,036,892 shares issued and outstanding as of December 31, 2022 and 2021, respectively	116	116
Additional paid-in capital	446,938	444,898
Accumulated other comprehensive income (loss)	(605)	5
Accumulated deficit	(338,671)	(300,521)
Total stockholders’ equity	107,778	144,498
Total liabilities and stockholders' equity	$ 139,777	$ 176,598