Preferred Stock (Tables)

12 Months Ended

Dec. 31, 2018

Stockholders' Equity Note [Abstract]

Components of Dividends Declared and Undeclared and in Kind Dividends Deemed on Preferred Stock

	Year ended December 31,
	2018		2017		2016
Preferred A dividends accrued at stated rate	$	-	$	-	$	222
Preferred A additional deemed dividends upon redemption		-		-		652
Preferred B dividends accrued at stated rate		-		-		243
Preferred B additional deemed dividends upon redemption		-		-		668
Preferred C dividends accrued at stated rate		-		-		455
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		578		483		-
Dividends declared and undeclared and in kind dividends deemed on preferred stock	$	578	$	12,243	$	20,748