Debt and Interest (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Debt [Line Items]
Total notes payable, long-term	$ 24,009	$ 14,009
Less: Discount of notes payable	718	6
Total notes payable, long-term, net	23,291	14,003
IDB Note [Member]
Debt [Line Items]
Total notes payable, long-term	$ 14,009	14,009
Interest Rate	2.25%
Maturity Date	Feb - 2017
NSC Note [Member]
Debt [Line Items]
Total notes payable, long-term	$ 10,000	$ 0
Interest Rate	8.00%
Maturity Date	Mar - 2018