Schedule of Accrued Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Schedule of Accrued Liabilities [Line Items]
Employee compensation	$ 4,440	$ 4,680
Accrued interest payable	862
Accrued purchases	429	604
Taxes	749	166
Contingent consideration	6,261	4,480
Royalties	592	7
Professional fees	357	269
Unearned revenue	643	258
Other accrued expenses	798	1,593
Total	$ 15,131	$ 12,057