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CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Unaudited) [Abstract] |  |
Revenues | $ 31,757 | $ 18,495
Cost of revenues | 12,636 | 13,719
Gross profit | 19,121 | 4,776
Operating expenses: |  |
Engineering and product development | 1,929 | 2,029
Selling and marketing | 13,152 | 9,194
General and administrative | 7,637 | 10,028
Total operating expenses | 22,718 | 21,251
Operating loss before other income (expense), net | (3,597) | (16,475)
Other income (expense), net: |  |
Interest expense, net | (4,900) | (10,200)
Change in fair value of warrant liability | 5,396 | 1,814
Other income, net | 21 | 33
Other income (expense), net | 517 | (8,353)
Loss before income taxes | (3,080) | (24,828)
Income tax expense | 255 | 119
Net loss | (3,335) | (24,947)
Deemed dividend related to warrant modification | 0 | (2,962)
Net loss attributable to common stockholders | $ (3,335) | $ (27,909)
Net loss per share: |  |
Basic (in dollars per share) | $ (0.31) | $ (3.27)
Diluted (in dollars per share) | $ (0.75) | $ (3.27)
Shares used in computing net loss per share: |  |
Basic (in shares) | 10,595,068 | 8,536,699
Diluted (in shares) | 11,578,573 | 8,536,699
Other comprehensive income (loss): |  |
Foreign currency translation adjustments | $ 1 | $ 1
Comprehensive loss | $ (3,334) | $ (27,908)

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