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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Income Statement [Abstract] |  |
Revenue | $ 1,918 | $ 5,328
Cost of revenue (exclusive of depreciation and amortization) | 1,290 | 2,374
Gross profit | 628 | 2,954
Operating expenses: |  |
Research and development | 692 | 1,327
Sales and marketing | 527 | 1,220
General and administrative | 2,067 | 2,028
Impairment charges | 31 | 541
Depreciation and amortization | 722 | 815
Total operating expenses | 4,039 | 5,931
Loss from operations | (3,411) | (2,977)
Interest and other expense, net | 5 | 154
Foreign exchange loss (gain) | 17 | (2)
Interest and other expense, net | 22 | 152
Loss before income taxes | (3,433) | (3,129)
Income tax expense | 0 | 0
Net loss | (3,433) | (3,129)
Preferred stock dividends | 1 | 4
Undeclared dividends | 366 | 0
Induced conversion of Series A-2 Preferred Stock | 300 | 0
Net loss attributable to common stockholders | $ (4,100) | $ (3,133)
Net loss attributable to common stockholders per share: |  |
Basic and diluted net loss per share (in dollars per share) | $ (0.23) | $ (0.60)
Weighted-average number of shares of common stock: |  |
Basic and diluted (in shares) | 17,756 | 5,204

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