Income Taxes - Additional Information (Detail) - USD ($)		3 Months Ended	12 Months Ended
	Dec. 31, 2015	Sep. 30, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Mar. 31, 2014
Schedule Of Income Tax [Line Items]
NOLs expiration period			20 years
NOLs available for deferred tax asset	$ 4,720,000		$ 4,720,000	$ 5,244,000
Deferred tax asset offset by a valuation allowance	2,051,000		2,051,000	816,000
Unrecognized stock-based compensation	17,863,000		17,863,000	101,108,000
Deferred tax asset for AMT credit	1,598,000		1,598,000
Valuation allowance resulting in income tax benefit	14,071,000		14,071,000	9,490,000		$ 21,221,000
Deferred tax asset resulting from foreign losses	2,051,000		2,051,000	816,000
Credit to additional paid-in capital for the amount of NOLs from stock-based compensation			$ 57,474,000	$ 21,893,000
Current baseline operating tax rate			41.65%	16.99%	0.00%
Federal statutory rate			35.00%	35.00%	35.00%
Uncertain tax positions, interest or penalties amount	0
Income tax examination description			Tax returns filed with each jurisdiction remain open to examination under the normal three-year statute of limitations.
Not recorded any deferred taxes on undistributed earnings and profits	117,000		$ 117,000
Previously Reported [Member] | State Income Tax [Member]
Schedule Of Income Tax [Line Items]
Current baseline operating tax rate		45.00%
Restatement Adjustment [Member] | State Income Tax [Member]
Schedule Of Income Tax [Line Items]
Current baseline operating tax rate		38.00%
Foreign Subsidiaries [Member]
Schedule Of Income Tax [Line Items]
NOLs available for deferred tax asset	6,685,000		6,685,000	$ 4,061,000
Deferred tax asset offset by a valuation allowance	$ 2,051,000		$ 2,051,000	$ 816,000