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Net Income (Loss) Per Share - Numerators and Denominators of Basic and Diluted Net Income (Loss) Per Share Computations (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands

3 Months Ended

12 Months Ended

Dec. 31, 2017

Sep. 29, 2017

Jun. 30, 2017

Mar. 31, 2017

Dec. 31, 2016

^[4]

Sep. 30, 2016

Jul. 01, 2016

Apr. 01, 2016

^[2]

Dec. 31, 2017

Dec. 31, 2016

Dec. 31, 2015

Numerator:

Net loss

$ (11,516)

^[1],[2],[3]

$ (15,583)

^[1],[2],[3]

$ (31,500)

^[1],[2],[3]

$ (24,027)

^[1],[2],[3]

$ (10,443)

^{[1],[2],[3],[5]}

$ (16,012)

^{[1],[2],[3],[5]}

$ (20,679)

^{[1],[2],[3],[5]}

$ (25,180)

^[1],[3],[5]

$ (82,955)

$ (72,314)

$ (15,661)

Denominator:

Basic and diluted

80,974

77,705

87,514

Basic and diluted

$ (1.02)

$ (0.93)

$ (0.18)

Basic net income (loss) per share from:

Net income (loss) per share - basic

$ (0.14)

$ (0.19)

$ (0.39)

$ (0.30)

Net loss per share:

Net income (loss) per share - diluted

^[5]

$ (0.13)

$ (0.21)

$ (0.27)

$ (0.33)

[1]	As a result of the TVN acquisition, in 2016 and 2017, the Company incurred acquisition- and integration-related expenses of $3.0 million, $3.4 million, $5.3 million and $5.2 million, in the first through fourth quarter of 2016, respectively, and $2.2 million, $0.5 million, $0.1 million and $0.1 million in the first through fourth quarter of 2017. These costs consisted of acquisition-related costs which include outside legal, accounting and other professional services as well as integration-related costs which include incremental costs resulting from the TVN acquisition that are not expected to generate future benefits once the integration is fully consummated. These costs are expensed as incurred and the Company does not expect to incur any TVN acquisition- and integration-related expenses after 2017.
[2]	In the first and third quarter of 2016 and the fourth quarter of 2017, the Company recorded impairment charges of $1.5 million, $1.2 million, and $0.5 million, respectively, for its investment in Vislink. (See Note 3, “Investments in Other Equity Securities,” of the notes to the Consolidated Financial Statements for additional information).
[3]	In the fourth quarter of 2016 and 2017, the Company recorded additional valuation allowances of $18.3 and $9.0 million against all of the U.S. deferred tax assets, respectively. These increases in valuation allowances were offset partially by the release of $8.4 million and $5.8 million in the fourth quarter of 2016 and 2017, respectively, of valuation allowances associated with the Company’s foreign subsidiaries, including a one-time benefit associated with the alternative minimum tax refund related to the TCJA in the fourth quarter of 2017.
[4]	In 2016, as part of the TVN integration plan, the Company established the TVN VDP to enable the French employees of TVN to voluntarily terminate with certain benefits. The Company recorded a charge of $13.1 million for TVN VDP in the fourth quarter of 2016.
[5]	On February 29, 2016, the Company completed the acquisition of TVN and applied the acquisition method of accounting for the business combination. The selected quarterly financial data for the year ended December 31, 2016 of the combined entity includes 10 months of operating results of TVN beginning March 1, 2016.

X

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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