Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2019	Dec. 31, 2018
Common Stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common Stock, shares authorized (in shares)	200,000,000	200,000,000
Common Stock, shares issued (in shares)	62,168,000	68,085,000
Common Stock, shares outstanding (in shares)	62,168,000	68,085,000
Preferred Stock Series D, G and I
Liquidation preference (in dollars per share)	$ 25	$ 25
Preferred Stock Series J
Liquidation preference (in dollars per share)	$ 50.00	$ 50