Income Taxes - Additional Information (Details)		12 Months Ended
	Jan. 01, 2018 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($) return	Dec. 31, 2017 USD ($)
Operating Loss Carryforwards [Line Items]
Foreign current income tax expense in other comprehensive loss		$ 100,000
Deferred income taxes		531,000	$ 493,000	$ 130,000
Increase (decrease) in valuation allowance			1,000,000
Undistributed foreign earnings, deferred tax liability				$ 0
Undistributed earnings of foreign subsidiaries		$ 0	$ 0
U.S. statutory federal rate		21.00%	21.00%	34.00%
Deferred tax asset, provisional income tax expense (benefit)				$ 16,600,000
Reduction of valuation allowance				16,700,000
Provisional income tax expense (benefit)				$ 100,000
Unrecognized tax benefits that would impact effective tax rate			$ 0
Unrecognized tax benefits, income tax penalties and interest accrued		$ 0	$ 0
Number of income tax returns under examination | return			0
Deferred Tax Assets from Current Operations
Operating Loss Carryforwards [Line Items]
Increase (decrease) in valuation allowance			$ 2,400,000
Accounting Standards Update 2014-09
Operating Loss Carryforwards [Line Items]
Deferred tax liabilities	$ 2,000,000
Deferred income taxes	(600,000)
Increase (decrease) in valuation allowance	$ (1,400,000)
Federal
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards		128,700,000	127,200,000
Tax credit carryforward		5,100,000	4,000,000
State
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards		151,100,000	154,500,000
Foreign
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards		$ 32,300,000	$ 32,600,000