Quarterly report pursuant to Section 13 or 15(d)

Equity and Mezzanine Equity - Changes in Carrying Value of Series D Preferred (Details)

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Equity and Mezzanine Equity - Changes in Carrying Value of Series D Preferred (Details) - Series D Preferred - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Temporary Equity [Line Items]    
Series D Preferred, Beginning Balance $ 76,955 $ 53,236
Accretion of Preferred Stock discount 148 148
Undeclared dividends 2,419 0
Issuance of Preferred Stock for acquisition of JANAF   21,158
Series D Preferred, Ending Balance $ 79,522 $ 74,542