Income Taxes - (Details Textual) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Non-cash tax benefit due to Tax Cuts and Jobs Act	$ 13,712,000
Deferred tax asset reflecting federal and state net operating losses	278,867,000	$ 348,734,000
Federal net operating losses		$ 1,295,712,000
Expiration date for federal net operating losses		2028
Unrecognized tax benefits that would affect the effective tax rate	$ 257,000	$ 274,000	$ 0
Period for unrecognized tax benefits to increase or decrease		12 months
Interest and penalties related to unrecognized tax benefits		$ 0