Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash	$ 13,908	$ 2,845
Restricted cash	15
Prepaid expenses	153	929
Other assets	42	34
Total current assets	14,118	3,808
Right-of-use assets and other	150	9
Property and equipment, net	200	3
Total assets	14,468	3,820
Current liabilities:
Accounts payable	638	170
Accrued liabilities	1,422	49
Lease liability, short-term	22
Total current liabilities	2,082	219
Long-term liabilities:
Commitments and contingencies (Notes 5, 14 and 16)		118
Lease and other long-term liabilities	94	23
Total liabilities	2,176	360
Commitments and contingencies (Note 5)
Stockholders’ (deficit) equity:
Redeemable convertible preferred stock (Series A and B), $0.0001 par value per share; 12,000,000 shares authorized and 4,801,020 issued and outstanding as of December 31, 2018; aggregate liquidation preference of $16,800 as of December 31, 2018. No shares authorized, issued or outstanding as of December 31, 2019.		16,746
Preferred stock, $0.001 par value; 10,000,000 and zero shares authorized as
Common stock, $0.001 par value per share, 100,000,000 shares authorized	16
Amount was recorded as a credit to additional paid in capital	49,130	2,266
Accumulated other comprehensive income	12	2
Accumulated deficit	(36,866)	(15,554)
Total stockholders’ equity (deficit)	12,292	(13,286)
Total liabilities, redeemable convertible preferred stock and stockholders’ equity (deficit)	$ 14,468	$ 3,820