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Business Acquisitions - Proforma Financial Information (Details) - Dealflo Limited - USD ($) $ / shares in Units, $ in Thousands | 6 Months Ended
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Jun. 30, 2018 | Jun. 30, 2017
Acquisition of Dealflo |  |
Revenue | $ 98,922 | $ 89,952
Net loss | $ (3,335) | $ (4,174)
Basic net loss per share | $ (0.08) | $ (0.10)
Diluted net loss per share | $ (0.08) | $ (0.10)
Shares used in computing basic and diluted net loss per share | 39,902 | 39,783

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