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CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Current assets: |  |
Cash and cash equivalents | $ 17,552 | $ 5,261
Accounts receivable | 1,169 | 178
Restricted cash | 40 | 40
Inventories, net | 107 | 107
Other current assets | 957 | 785
Current assets held for sale |  | 3,277
Total current assets | 19,825 | 9,648
Property and equipment, net | 2,179 | 2,299
Operating lease right-use-of assets | 781 |
Other assets | 72 | 39
Noncurrent assets held for sale |  | 11,633
Goodwill | 372 | 372
Total assets | 23,229 | 23,991
Current liabilities: |  |
Accounts payable and accrued expenses | 3,279 | 2,777
Operating lease liability | 147 |
Term loan obligation, net of discount | 11,060 | 14,202
Current liabilities held for sale |  | 580
Total current liabilities | 14,486 | 17,559
Other noncurrent liabilities | 8 | 46
Noncurrent operating lease liability | 646 |
Warrant liability | 6,929 | 916
Noncurrent liabilities held for sale |  | 245
Total liabilities | 22,069 | 18,766
Commitments and contingencies (Note 7) |  |
Stockholders’ equity: |  |
Preferred stock, $0.001 par value; 5,000,000 shares authorized; 1,959 and 4,606 shares issued and outstanding in 2019 and 2018, respectively |  |
Common stock, $0.001 par value; 100,000,000 shares authorized; 3,880,588 and 296,609 shares issued and outstanding in 2019 and 2018, respectively | 4 |
Additional paid-in capital | 426,426 | 418,390
Accumulated other comprehensive income |  | 1,218
Accumulated deficit | (425,270) | (414,383)
Total stockholders’ equity | 1,160 | 5,225
Total liabilities and stockholders’ equity | $ 23,229 | $ 23,991

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