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The Company and Summary of Significant Accounting Policies - Summary of Computation of Basic and Diluted Net Income (Loss) Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Numerator:
Net Income	$ 10	$ 348
Shares used in computing net income (loss) per share
Add: weighted-average common shares outstanding	43,068	8,130
Total shares: basic	43,068	8,130
Total shares: diluted	45,412	8,347
Net income per share:
Basic	$ 0.00	$ 0.04
Diluted	$ 0.00	$ 0.04
Stock Option [Member]
Shares used in computing net income (loss) per share
Weighted-average stock options, restricted stock and issuable on conversion of warrants		63
RSU's
Shares used in computing net income (loss) per share
Weighted-average stock options, restricted stock and issuable on conversion of warrants	46	154
Outstanding warrants
Shares used in computing net income (loss) per share
Weighted-average stock options, restricted stock and issuable on conversion of warrants	2,298

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