Summary of Financial Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Total before discount and debt issuance costs	$ 17,928	$ 18,300
Less: Current portion of financial liabilities	(8,262)	(8,300)
Less: Long-term portion of unamortized discount and debt issuance costs	(2,032)	(221)
Long-term financial liabilities	7,634	9,779
Secured Term Loan
Debt Instrument [Line Items]
Total before discount and debt issuance costs	10,000	10,000
Bank Revolving Loan Facility
Debt Instrument [Line Items]
Total before discount and debt issuance costs	$ 7,928	$ 8,300