Summary of Significant Accounting Policies - Summary of Acquired Intangible Assets (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($)
Acquired Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 6,637
Accumulated Amortization	701
Net Carrying Amount	$ 5,936
Trademarks [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Estimated Economic Life	2 years
Gross Carrying Amount	$ 686
Accumulated Amortization	300
Net Carrying Amount	$ 386
Customer Relationships [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Estimated Economic Life	13 years
Gross Carrying Amount	$ 5,951
Accumulated Amortization	401
Net Carrying Amount	$ 5,550