Summary of Significant Accounting Policies (Details)			12 Months Ended
	Jan. 01, 2019 USD ($)	Jan. 01, 2018	Dec. 31, 2019 USD ($) item	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Number of states in which the Company operates | item			48
Impairment of long-lived assets			$ 0	$ 0	$ 0
ROU asset			6,605,000
Operating lease liabilities			7,140,000
Lease, Practical Expedients, Package [true false]	true
Lease, Practical Expedient, Use of Hindsight [true false]	false
Lessee, Operating Lease, Existence of Option to Extend [true false]	true
Impairment of intangibles			$ 0	$ 0	$ 0
Maximum original expected duration of cancelable service contracts			1 year
Revenue, Practical Expedient, Financing Component [true false]		true
Revenue, Practical Expedient, Incremental Cost of Obtaining Contract [true false]		true
Revenue, Practical Expedient, Initial Application and Transition, Completed Contract, Same Reporting Period [true false]		true
Revenue, Practical Expedient, Initial Application and Transition, Completed Contract, Use of Transaction Price at Contract Completion Date [true false]		true
Revenue, Practical Expedient, Initial Application and Transition, Nondisclosure of Transaction Price Allocation to Remaining Performance Obligation [true false]		true
Statutory federal rate (as a percent)			21.00%	21.00%	35.00%
Minimum
Renewal terms (in years)	1 year
Maximum
Renewal terms (in years)	10 years
ASU 2016-02 | Adjustment
ROU asset	$ 7,769,000
Operating lease liabilities	8,252,000
ASU 2016-02 | Adjustment | Prepaid expenses and other current assets
Prepaid rent	14,000
ASU 2016-02 | Adjustment | Other accrued liabilities
Deferred rent	$ 497,000