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v3.19.1

Consolidated Balance Sheets - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Current assets: |  |
Cash and cash equivalents | $ 5,358 | $ 12,689
Accounts receivable, net of allowance for doubtful accounts of $9 and $6 at December 31, 2018 and 2017, respectively | 274 | 95
Inventory | 141 | 191
Prepaid expenses | 445 | 340
Total current assets | 6,218 | 13,315
Property and equipment, net | 145 | 169
Other assets | 54 | 54
Total assets | 6,417 | 13,538
Current liabilities: |  |
Accounts payable | 1,020 | 902
Accrued expenses and other current liabilities | 1,528 | 1,263
Deferred revenue |  | 167
Total current liabilities | 2,548 | 2,332
Deferred rent | 77 | 81
Total liabilities | 2,625 | 2,413
Stockholders’ equity: |  |
Preferred stock, $0.001 par value, 25,000,000 shares authorized as of December 31, 2018 and 2017; no shares issued and outstanding as of December 31, 2018 and 2017 |  |
Common stock, $0.001 par value, 100,000,000 shares authorized as of December 31, 2018 and 2017; 43,611,240 and 38,218,660 shares issued and outstanding as of December 31, 2018 and 2017, respectively | 43 | 38
Additional paid-in capital | 90,110 | 83,537
Accumulated deficit | (86,361) | (72,450)
Total stockholders’ equity | 3,792 | 11,125
Total liabilities and stockholders’ equity | $ 6,417 | $ 13,538

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