Stockholders' Equity Preferred Stock (Details) - shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Preferred Stock [Abstract]
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities	1,640,477	799,680	18,904