Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Sep. 13, 2013	Dec. 31, 2010
Income Tax Disclosure [Line Items]
Deferred tax assets	$ 124,000
Deferred tax assets	400,000
R&D credit carry forwards carry forwards expiration period	Various dates between 2018 and 2028
Minimum tax credit carryover	1,500,000
Credit to additional paid-in capital	6,797,000	4,713,000	10,000
Income tax receivable	2,300,000	800,000
Estimated income tax expense benefit	55,000
Research and development tax credit studies	9,800,000
Liability for unrecognized tax benefits	3,122,000	2,903,000	1,982,000		2,282,000
Unrecognized tax benefits, accrued interest	12,000	0
Income tax regulations related to tangible property, effect on deferred tax liabilities	2,136,000	662,000		1,300,000
State [Member]
Income Tax Disclosure [Line Items]
NOL carry forward expiration date	Various dates between 2016 and 2031
Liability for unrecognized tax benefits	100,000
State [Member] | ARIZONA [Member]
Income Tax Disclosure [Line Items]
State research and development credit carry forwards	2,800,000
State [Member] | CALIFORNIA [Member]
Income Tax Disclosure [Line Items]
State research and development credit carry forwards	300,000
Federal [Member] | CALIFORNIA [Member]
Income Tax Disclosure [Line Items]
NOL carry forward expiration date	between 2031 and 2033
Federal [Member]
Income Tax Disclosure [Line Items]
Liability for unrecognized tax benefits	$ 3,000,000