Quarterly report pursuant to Section 13 or 15(d)

Accrued Expenses and Other Current Liabilities (Details)

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Accrued Expenses and Other Current Liabilities (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Accrued Liabilities Current Line Items [Line Items]    
Salaries, benefits and incentive compensation $ 1,713 $ 3,007
Milestone payment to licensor 1,000 1,000
Professional fees 483 692
Royalty fees 200 197
Deferred revenue 339 181
Other 141 147
Total accrued expenses and other current liabilities $ 3,876 $ 5,224