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CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Current assets:    
Cash and cash equivalents $ 17,653 $ 12,761 [1]
Restricted cash 5,500 5,500 [1]
Marketable securities [1]   16,364
Prepaids and other current assets 1,712 1,697 [1]
Total current assets 24,865 36,322 [1]
Property and equipment, net [1]   3
Operating lease right-of-use asset 545 817 [1]
Other assets 96 98 [1]
Total assets 25,506 37,240 [1]
Current liabilities:    
Accounts payable 452 791 [1]
Accrued clinical expense 402 521 [1]
Accrued compensation 692 985 [1]
Other accrued liabilities 1,836 1,109 [1]
Notes payable 5,473 5,465 [1]
Operating lease liability - current 545 545 [1]
Total current liabilities 9,400 9,416 [1]
Other liabilities [1]   9
Operating lease liability - long term [1]   272
Total liabilities 9,400 9,697 [1]
Commitments and contingencies [1]
Stockholders’ equity:    
Convertible preferred stock 11,769 11,769 [1]
Common stock 11 11 [1]
Additional paid-in capital 699,291 698,562 [1]
Accumulated other comprehensive income [1]   1
Accumulated deficit (694,965) (682,800) [1]
Total stockholders’ equity 16,106 27,543 [1]
Total liabilities and stockholders’ equity $ 25,506 $ 37,240 [1]
[1] The condensed consolidated balance sheet as of December 31, 2019, has been derived from the audited financial statements as of that date included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2019.