Redeemable Series A Preferred Stock - Schedule of Dividend Annual Rates (Details) - Series A Preferred Stock	Jan. 31, 2018
Years 1 through 3 | LIBOR
Temporary Equity [Line Items]
Cash Dividend Annual Rate, basis spread on variable rate	8.50%
Accrued Dividend Annual Rate, basis spread on variable rate	9.00%
Year 4
Temporary Equity [Line Items]
Cash Dividend Annual Rate	8.50%
Accrued Dividend Annual Rate	9.00%
Year 5 | LIBOR
Temporary Equity [Line Items]
Cash Dividend Annual Rate, basis spread on variable rate	9.50%
Accrued Dividend Annual Rate, basis spread on variable rate	10.00%
Year 6 through redemption | LIBOR
Temporary Equity [Line Items]
Cash Dividend Annual Rate, basis spread on variable rate	10.50%
Accrued Dividend Annual Rate, basis spread on variable rate	11.00%