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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Income Statement [Abstract] |  |  |  |
Revenue | $ 2,049 | $ 2,816 | $ 3,967 | $ 8,144
Cost of revenue (exclusive of depreciation and amortization) | 1,249 | 1,683 | 2,539 | 4,072
Gross profit | 800 | 1,133 | 1,428 | 4,072
Operating expenses: |  |  |  |
Research and development | 599 | 988 | 1,291 | 2,315
Sales and marketing | 572 | 834 | 1,099 | 2,040
General and administrative | 1,383 | 1,815 | 3,450 | 3,842
Impairment charges | 17 | 0 | 48 | 550
Depreciation and amortization | 707 | 796 | 1,429 | 1,612
Total operating expenses | 3,278 | 4,433 | 7,317 | 10,359
Loss from operations | (2,478) | (3,300) | (5,889) | (6,287)
Interest and other expense, net | 9 | 76 | 14 | 220
Other income | (227) | 0 | (227) | 0
Foreign exchange loss (gain) | (14) | 9 | 3 | 7
Interest and other (income) expense, net | (232) | 85 | (210) | 227
Loss before income taxes | (2,246) | (3,385) | (5,679) | (6,514)
Income tax expense | 0 | 0 | 0 | 0
Net loss | (2,246) | (3,385) | (5,679) | (6,514)
Preferred stock dividends | 0 | 4 | 1 | 8
Less: undeclared dividends | 0 | 0 | 366 | 0
Induced conversion of Series A-2 Preferred Stock | 0 | 0 | 300 | 0
Net loss attributable to common stockholders | (2,246) | (3,389) | (6,346) | (6,522)
Net loss attributable to common stockholders | $ (2,246) | $ (3,389) | $ (6,346) | $ (6,522)
Net loss attributable to common stockholders per share: |  |  |  |
Basic net loss per share (in dollars per share) | $ (0.08) | $ (0.65) | $ (0.29) | $ (1.25)
Diluted net loss per share (in dollars per share) | $ (0.08) | $ (0.65) | $ (0.29) | $ (1.25)
Weighted-average number of shares of common stock: |  |  |  |
Basic (in shares) | 26,644 | 5,240 | 22,250 | 5,222
Diluted (in shares) | 26,644 | 5,240 | 22,250 | 5,222

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