Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Tax (Provision) Benefit at Federal Rate	$ (2,556)	$ 436	$ (1,416)
Change in Federal Tax Rate	0	0	(609)
State Tax Provision, Net of Federal Benefit	(903)	(417)	(376)
Change in Valuation Allowance	(10)	144	1,197
Other	63	(71)	11
Income Tax (Provision) Benefit	$ (3,406)	$ 92	$ (1,193)