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CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Assets |  |
Cash and cash equivalents | $ 22,141 | $ 11,298
Accounts receivable, net | 4,605 | 10,082
Inventory | 11,344 | 19,531
Prepaid expenses and other current assets | 7,481 | 6,430
Total current assets | 45,571 | 47,341
Property and equipment, net | 843 | 1,442
Other assets | 3,898 | 6,676
Total assets | 50,312 | 55,459
Liabilities and stockholders' equity |  |
Current portion of long-term debt | 177 | 9,821
Accounts payable | 8,856 | 7,234
Accrued expenses | 11,436 | 10,265
Deferred revenue | 5 | 291
Total current liabilities | 20,474 | 27,611
Income tax payable | 1,243 | 1,961
Long-term debt, less current portion | 185 | 362
Total liabilities | 21,902 | 29,934
Commitments and contingencies (Note 10) |  |
Stockholders' equity | 28,410 | 25,525
Common stock, $0.001 par value per share; 100,000,000 shares authorized: and 66,310,867 and 20,437,235 shares issued and outstanding at, December 31, 2020 and December 31, 2019, respectively. | 66 | 20
Preferred stock, $0.001 par value per share, 5,000,000 shares authorized |  |
Additional paid-in capital | 224,522 | 191,751
Accumulated deficit | (196,178) | (166,246)
Total stockholders’ equity | 28,410 | 25,525
Total liabilities and stockholders' equity | $ 50,312 | $ 55,459

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