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Stock-Based Compensation - Summary of RSU Activity (Detail) - Equity Incentive Plan 2010 - RSU's - $ / shares shares in Thousands	3 Months Ended
	Jun. 30, 2019	Mar. 31, 2019
Number of Shares
Non-vested shares at the beginning of the year	2,122	272
Granted (in shares)	120	2,028
Vested (in shares)	(94)	(167)
Cancelled (in shares)		(11)
Non-vested shares at the end of the period	2,148	2,122
Weighted Average Grant-Date Fair Value
Weighted average grant date fair value	$ 0.23	$ 1.23
Granted (in shares)	0.23	0.20
Vested (in shares)	0.81	1.48
Cancelled (in shares)		1.26
Weighted average grant date fair value	$ 0.20	$ 0.23

X

- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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