Income Taxes - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating Loss Carryforwards [Line Items]
Federal NOL carry-forwards		$ 400,000	$ 400,000
Increase (decrease) in valuation allowance		(25,500,000)	6,800,000
Valuation allowance		62,688,000	88,171,000
Federal NOL carry-forwards		86,400,000	106,800,000
State NOL carry-forwards		85,400,000	$ 105,400,000
Foreign NOL carryforwards		$ 28,600,000
U.S. federal income tax rate		35.00%	35.00%
Provisional net tax benefit recognized associated with enactment of Tax Legislation		$ 34,700,000
Impact on annual effective income tax rate		688.40%
Tax Cuts And Jobs Act incomplete acccounting description		we have not completed our accounting for the tax effects of enactment of the Act; however, we have made reasonable estimate of the effects on our existing deferred tax balances.
Provisional amounts for other provisions of Tax Legislation, including one-time transition tax		$ 0
Interest or penalties as result of tax uncertainties		0	$ 0
Unrecognized tax benefits as a result of tax positions taken		0	$ 0
Scenario, Plan
Operating Loss Carryforwards [Line Items]
U.S. federal income tax rate	21.00%
Ownership Changes in 2013 and 2017 | NOL Carry-forwards
Operating Loss Carryforwards [Line Items]
Reduction in NOL carry-forwards available against corresponding valuation allowance		$ 32,800,000
Domestic Tax Authority | Latest Tax Year
Operating Loss Carryforwards [Line Items]
NOL carryforwards expiration		2037	2037
Domestic Tax Authority | Earliest Tax Year
Operating Loss Carryforwards [Line Items]
NOL carryforwards expiration		2019	2019
Foreign Tax Authority | Latest Tax Year
Operating Loss Carryforwards [Line Items]
NOL carryforwards expiration		2024
Foreign Tax Authority | Earliest Tax Year
Operating Loss Carryforwards [Line Items]
NOL carryforwards expiration		2018
Puerto Rico
Operating Loss Carryforwards [Line Items]
Federal NOL carry-forwards		$ 5,100,000	$ 3,100,000
Valuation allowance		23,400,000
UNITED STATES
Operating Loss Carryforwards [Line Items]
Valuation allowance		$ 39,300,000