Debt - Principal Payments on Debt (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Debt Disclosure [Abstract]
2017	$ 3,795
2018	4,046
2019	16,427
2020	3,333
2021	21,667
Total	49,268
Add: capital lease principal payments	480	$ 1,277
Less: debt discount	(3,543)	(5,642)
Total	46,205	80,222
Less: current portion of long-term debt	(3,113)	(79,742)
Long-term debt, net of current portion	$ 43,092	$ 480

Present value of minimum lease payments for capital leases net of executory costs, including amounts paid by the lessee to the lessor for insurance, maintenance and taxes.

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Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations.

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Amount, after accumulated amortization, of debt discount.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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