Summary of Significant Accounting Policies - Recently Adopted Accounting Pronouncements (Details) - USD ($) $ in Thousands		12 Months Ended
	Jan. 01, 2019	Dec. 31, 2019
Recently Adopted Accounting Pronouncements
Lease, Practical Expedients, Package	true	true
Operating lease right-of-use assets		$ 1,620
Operating lease liabilities		$ 1,827
Accounting Standards Update 2016-02 | Adjustment
Recently Adopted Accounting Pronouncements
Operating lease right-of-use assets	$ 2,100
Operating lease liabilities	$ 2,200