Accrued Expenses - Schedule of Accrued Expenses (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Accrued Liabilities Current [Abstract]
Taxes and other assessments	$ 2,225	$ 2,676
Compensation and benefits	2,291	2,328
Interest and final payment fee	1,100	1,000
Deferred rent	353	323
Consulting and other vendors	593	1,428
Legal and professional fees	142	243
Royalties	162	159
Other	396	49
Total	$ 7,262	$ 8,206