IMO no the OS increase in the last few months is in most part related to series C PS redemption installment payments. From Jan 11 2018 10K :
On November 1, 2017 and on the sixteenth day and first day of each calendar month thereafter until March 1, 2019, subject to extension in certain circumstances (the “Maturity Date”), inclusive, the Company will redeem the stated value of Series C Preferred Shares in thirty-three equal installments of $1.0 million (each bimonthly amount, an “Installment Amount” and the date of each such payment, an “Installment Date”). The holders will have the ability to defer Installment payments, but not beyond the Maturity Date. In addition, during each period commencing on the 11th trading day
PPS calculation methods:
Installment Amounts paid in shares will be that number of shares of Common Stock equal to (a) the applicable Installment Amount, to be paid in Common Stock divided by (b) the least of (i) the then existing Conversion Price, (ii) 87.5% of the volume weighted average price (“VWAP”) of the Common Stock on the trading day immediately prior to the applicable Installment Date, and (iii) 87.5% of the arithmetic average of the two lowest VWAPs of the Common Stock during the ten consecutive Trading Day (as such term is defined in the Certificate of Designations) period ending and including the Trading Day immediately prior to the applicable Installment Date as applicable, provided that the Company meets standard equity conditions. The Company shall make such election no later than the eleventh (11th) trading day immediately prior to the applicable Installment Date
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