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CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Assets |  |
Cash and cash equivalents | $ 13,912 | $ 22,141
Accounts receivable, net | 5,834 | 4,605
Inventory | 10,556 | 11,344
Prepaid expenses and other current assets | 5,961 | 7,481
Total current assets | 36,263 | 45,571
Property and equipment, net | 749 | 843
Other assets | 3,734 | 3,898
Total assets | 40,746 | 50,312
Liabilities and stockholders’ equity |  |
Current portion of long-term debt | 177 | 177
Accounts payable | 11,194 | 8,856
Accrued expenses | 8,540 | 11,436
Deferred revenue | 0 | 5
Total current liabilities | 19,911 | 20,474
Income tax payable | 1,256 | 1,243
Long-term debt, less current portion | 148 | 185
Total liabilities | 21,315 | 21,902
Commitments and contingencies (Note 10) |  |
Stockholders' equity |  |
Common stock, $0.001 par value per share; 100,000,000 shares authorized: and 66,317,949 and 66,310,867 shares issued and outstanding at March 31, 2021 and December 31, 2020, respectively. | 66 | 66
Preferred stock, $0.001 par value per share, 5,000,000 shares authorized, and no shares issued and outstanding at March 31, 2021 and December 31, 2020, respectively. |  |
Additional paid-in capital | 224,823 | 224,522
Accumulated deficit | (205,458) | (196,178)
Total stockholders’ equity | 19,431 | 28,410
Total liabilities and stockholders’ equity | $ 40,746 | $ 50,312

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