CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 7,232	$ 8,067
Marketable securities, available-for-sale	4,497	0
Prepaid expenses and other current assets	6,240	204
Total current assets	17,969	8,271
Property and equipment, net	16	37
Operating lease right-of-use asset	159
Intangible assets	0	441
Total assets	18,144	8,749
Current liabilities:
Accounts payable	2,245	4,067
Accrued liabilities	6,379	3,272
Lease liability, current portion	78
Deferred revenue, current portion	1,795	8,117
Note payable	0	4,639
Total current liabilities	10,497	20,095
Lease liability, net of current portion	73
Contingent consideration	0	145
Warrant liability	0	242
Deferred revenue, net of current portion	0	1,595
Total liabilities	10,570	22,077
Redeemable convertible preferred stock (Series A, B, C and C-1), $0.01 par value, 5,000,000 and 4,182,943 shares authorized at December 31, 2019 and 2018, respectively; 0 and 1,256,466 shares issued and outstanding at December 31, 2019 and 2018, respectively; aggregate liquidation preference of $0 and $46,985 at December 31, 2019 and 2018, respectively	0	58,290
Commitments and contingencies (Note 7)
Stockholders’ equity (deficit):
Common stock, $0.01 par value, 50,000,000 and 8,000,000 shares authorized at December 31, 2019 and 2018, respectively; 8,480,968 and 589,001 shares issued and outstanding at December 31, 2019 and 2018, respectively	85	6
Additional paid-in capital	92,497	0
Accumulated other comprehensive loss	(28)	0
Accumulated deficit	(84,980)	(71,624)
Total stockholders’ equity (deficit)	7,574	(71,618)
Total liabilities, redeemable convertible preferred stock, and stockholders’ equity (deficit)	$ 18,144	$ 8,749