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CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Current assets:    
Cash and cash equivalents $ 8,346 $ 17,552
Accounts receivable 0 1,169
Restricted cash   40
Inventories, net   107
Other current assets 829 957
Total current assets 9,175 19,825
Property and equipment, net 1,820 2,179
Operating lease right-use-of assets 636 781
Goodwill 372 372
Intangible assets, net 86  
Other assets 16 72
Total assets 12,105 23,229
Current liabilities:    
Accounts payable and accrued expenses 2,081 3,279
Operating lease liability 123 147
Term loan obligation, net of discount 6,335 11,060
Total current liabilities 8,539 14,486
Noncurrent operating lease liability 528 646
Warrant liability 7 6,929
Other noncurrent liabilities   8
Total liabilities 9,074 22,069
Commitments and contingencies (Note 7)
Stockholders’ equity:    
Preferred stock, $0.001 par value; 5,000,000 shares authorized; 1,954 and 1,959 shares issued and outstanding in 2020 and 2019, respectively
Common stock, $0.001 par value; 100,000,000 shares authorized; 6,749,028 and 3,880,588 shares issued and outstanding in 2020 and 2019, respectively 7 4
Additional paid-in capital 436,535 426,426
Accumulated deficit (433,511) (425,270)
Total stockholders’ equity 3,031 1,160
Total liabilities and stockholders’ equity $ 12,105 $ 23,229