Summary of Significant Accounting Policies - Impact of Adoption (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use assets	$ 3,970
Current portion of operating lease liability	2,608
Operating lease liability, net of current portion	2,076
Accrued expenses and other current liabilities	7,248		$ 12,857
ASU 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use assets		$ 5,810
Current portion of operating lease liability		1,892
Operating lease liability, net of current portion		4,684
Accrued expenses and other current liabilities		12,673	12,857
Other long-term liabilities			$ 582
Under Topic 840
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accrued expenses and other current liabilities	7,571
Other long-term liabilities	258
Effect of Change
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use assets	3,970
Current portion of operating lease liability	2,608
Operating lease liability, net of current portion	2,076
Accrued expenses and other current liabilities	(323)
Other long-term liabilities	$ (258)
Effect of Change | ASU 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use assets		5,810
Current portion of operating lease liability		1,892
Operating lease liability, net of current portion		4,684
Accrued expenses and other current liabilities		(184)
Other long-term liabilities		$ (582)