Preferred Stock (Tables)

12 Months Ended

Dec. 31, 2017

Stockholders' Equity Note [Abstract]

Components Of Dividends Declared And Undeclared And In Kind Dividends Deemed On Preferred Stock

	Year ended December 31,
	2017		2016		2015
Preferred A dividends accrued at stated rate	$	-	$	222	$	727
Preferred A additional deemed dividends upon redemption		-		652		-
Preferred B dividends accrued at stated rate		-		243		831
Preferred B additional deemed dividends upon redemption		-		668		-
Preferred C dividends accrued at stated rate		-		455		2,074
Preferred C additional deemed dividends at exchange		-		15,418		-
Preferred D dividends accrued at stated rate		650		3,090		-
Preferred D inducement to convert		11,110		-		-
Preferred E dividends accrued at stated rate		483		-		-
Dividends declared and undeclared and in kind dividends deemed on preferred stock	$	12,243	$	20,748	$	3,632