Basis of Presentation and Summary of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Thousands, shares in Millions		6 Months Ended
	Oct. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Inventory, Work in Process, Net of Reserves		$ 200
Total inventory		939		$ 0
Finished goods		$ 700
Potentially dilutive common shares related to the outstanding preferred stock, stock options, restricted stock units and warrants (in shares)		14.2	11.5
Term of lease agreement	10 years