Summary of Significant Accounting Policies - Schedule of Effect On Company's Consolidated Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Notes payable, net of discount	$ 52	$ 1,285
Total current liabilities	1,008	1,832
Total liabilities	1,067	1,832
Accumulated deficit	(414,502)	(404,719)
Total stockholders' deficit	$ 3,227	(1,309)	$ 11,873
Gain on extinguishment of debt		1,875
Accretion of debt discount		(919)
As Previously Reported [Member]
Notes payable, net of discount		1,851
Total current liabilities		2,398
Total liabilities		2,398
Accumulated deficit		(405,285)
Total stockholders' deficit		(1,875)
Gain on extinguishment of debt		1,295
Accretion of debt discount		(905)
Adjustment [Member]
Notes payable, net of discount		(566)
Total current liabilities		(566)
Total liabilities		(566)
Accumulated deficit		566
Total stockholders' deficit		566
Gain on extinguishment of debt		580
Accretion of debt discount		$ (14)