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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Income Statement [Abstract] |  |  |  |
Revenue | $ 3,481 | $ 4,344 | $ 11,417 | $ 14,950
Operating expenses: |  |  |  |
Cost of revenue (exclusive of depreciation and amortization) | 1,988 | 2,609 | 6,697 | 9,187
Research and development | 296 | 229 | 875 | 817
Sales and marketing | 69 | 70 | 369 | 576
General and administrative | 970 | 1,664 | 2,843 | 4,009
Impairment charges | 1,707 | 605 | 1,712 | 630
Depreciation and amortization | 451 | 455 | 1,370 | 1,509
Total operating expenses | 5,481 | 5,632 | 13,866 | 16,728
Loss from operations | (2,000) | (1,288) | (2,449) | (1,778)
Interest expense and other, net | (197) | (362) | (916) | (1,081)
Gain on extinguishment of debt | 9,045 | 0 | 9,045 | 0
Amortization of debt discount | (28) | (18) | (64) | (54)
Interest and other income (expense), net | (8,820) | 380 | (8,065) | 1,135
Income (loss) before income taxes | 6,820 | (1,668) | 5,616 | (2,913)
Income tax benefit (expense) | 284 | (37) | 230 | (108)
Net income (loss) | 7,104 | (1,705) | 5,846 | (3,021)
Preferred stock dividends | 3 | 3 | 9 | 9
Net income (loss) attributable to common stockholders | $ 7,101 | $ (1,708) | $ 5,837 | $ (3,030)
Net income (loss) attributable to common stockholders per share: |  |  |  |
Basic net income (loss) per share (in dollars per share) | $ 0.19 | $ (0.05) | $ 0.16 | $ (0.09)
Diluted net income (loss) per share (in dollars per share) | $ 0.19 | $ (0.05) | $ 0.15 | $ (0.09)
Weighted-average number of shares of common stock: |  |  |  |
Basic (in shares) | 36,897 | 35,492 | 37,078 | 35,480
Diluted (in shares) | 37,897 | 35,492 | 38,078 | 35,480

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