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Note 10 - Series B Mandatorily Redeemable Preferred Stock | 9 Months Ended
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Sep. 30, 2020
Notes to Financial Statements |
Financial Instruments Subject to Mandatory Redemption Disclosure [Text Block] | 10. SERIES B MANDATORILY REDEEMABLE PREFERRED STOCK During the year ended December 31, 2019, the Company redeemed all of its remaining 16,900 shares of its Series B Preferred Stock for $16.9 million. As of September 30, 2020 and December 31, 2019, no Series B Preferred Stock remained outstanding. Amortization expense of $122,000 was included in interest expense for the nine months ended September 30, 2019, and no related amortization expense was incurred during the three months ended September 30, 2020 in the accompanying condensed consolidated statements of operations. There were no unamortized deferred costs as of September 30, 2020 and December 31, 2019, respectively.

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