Accounting for Stock-Based Compensation - Additional Information (Detail) - USD ($)	3 Months Ended	6 Months Ended
Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted stock units issued	1,088,050	2,364,200
Number of stock options issued	1,140,200	4,920,267
Share-based Compensation Arrangement by Share-based Payment Award, Options,grant date fair value	$ 0.74
Weighted average vesting period for unrecognized compensation cost			3 years
Unrecognized compensation cost, share-based compensation arrangements	$ 0		$ 0
Common Stock \| Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options,grant date fair value	$ 0.91
Aggregate number of shares granted to awards, share-based compensation arrangements	4,015,000
Fair value of stock granted, share-based compensation arrangements	$ 3,000,000
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based payment award , vesting period	4 years	4 years
Fair value of the stock options granted , value	$ 700,000	$ 3,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Options,grant date fair value	$ 0.62	$ 0.61
Unrecognized compensation cost related to options	$ 5,600,000		5,600,000
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of Restricted stock options granted , value	$ 1,000,000	$ 2,200,000
Share-based Compensation Arrangement by Share-based Payment Award, Options,grant date fair value	$ 0.91	$ 0.92
Unrecognized compensation cost related to non-option	$ 7,100,000		$ 7,100,000

Unrecognized cost of unvested share-based compensation awards.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

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Gross number of share options (or share units) granted during the period.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Value, before forfeitures, of stock or other type of equity granted of any equity-based compensation plan other than an employee stock ownership plan (ESOP).

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Number of shares issued during the period related to Restricted Stock Awards, net of any shares forfeited.

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