Income Taxes - Schedule of Net Operating Loss Expiration (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($)
Operating Loss Carryforwards [Line Items]
Net operating loss expiration amount	$ 26,070
2019 [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss expiration amount	5,078
2021 [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss expiration amount	579
2023 [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss expiration amount	608
2024 [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss expiration amount	1,942
2032 [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss expiration amount	13,419
2033 [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss expiration amount	$ 4,444