Note 7 - Stockholders' Equity	9 Months Ended
Sep. 30, 2020
Notes to Financial Statements
Stockholders' Equity Note Disclosure [Text Block]	NOTE 7 – STOCKHOLDERS’ EQUITY Preferred Stock On August 31, 2020, the Company issued and sold 85,000 shares of Series A Redeemable Convertible Preferred Stock, par value of $0.0001, (“Preferred Stock”) for $1,000 per share for gross proceeds of $85.0 million. The Preferred Stock has senior and preferential ranking to the Company’s common stock. The Preferred Stock is entitled to cumulative dividends of 6.00% per annum, and for the first two years, the dividends will be paid-in-kind. After the second anniversary of the issuance date, the dividends may be paid-in-kind or be paid in cash at the Company’s option. The Preferred Stock is convertible at any time, at the holder’s election, into a number of shares of common stock of the Company equal to the quotient obtained by dividing the then-current accrued value by the conversion price of $9.50. At any time after the third anniversary of the issuance, the Company may, at its option, convert all, but not less than all, of the Preferred Stock into common stock if the closing price of shares of common stock is at least 150% of the conversion price for 20 out of 30 consecutive trading days. The number of shares of common stock received in such conversion shall be equal to the quotient obtained by dividing the then-current accrued value by the conversion price. At the six-year anniversary of the closing date, each investor has the right to require the Company to repurchase their Preferred Stock and any Preferred Stock not requested to be repurchased shall be converted into common shares of the Company equal to the quotient obtained by dividing the then-current accrued value by the conversion price. For the three and nine months ended September 30, 2020, the Company recorded $0.4 million in accrued dividends for Preferred Stock. The Preferred Stock deferred issuance costs was approximately $2.8 million as of September 30, 2020. As of September 30, 2020, the Preferred Stock could be converted at the option of the holders into approximately 8.9 million shares of the Company’s common stock. Stock and Warrant Repurchase Plan The Company’s Board of Directors approved a stock and warrant repurchase plan (“Repurchase Plan”) in November 2015 and increased the repurchase plan to $35.0 million in November 2016. The Repurchase Plan authorizes the Company to purchase, from time to time, the Company’s outstanding common stock and previously outstanding warrants. Any shares purchased will be retired. The Repurchase Plan has no time deadline and will continue until otherwise modified or terminated at the sole discretion of the Company’s Board of Directors. These repurchases exclude shares repurchased to settle statutory employee tax withholding related to the exercise of stock options and vesting of stock awards. Since March 2020, the Repurchase Plan has been suspended due to the uncertain impact of the COVID-19 virus. Prior to its suspension, the Company had repurchased 8,517 shares of common stock for approximately $127,000 during 2020. The Company has cumulatively repurchased 875,218 shares of common stock for $8.3 million and 6,011,926 warrants for $14.7 million since plan inception. All repurchases were made using cash resources. The remaining balance for the Repurchase Plan was $12.0 million as of September 30, 2020.

Note 7 - Stockholders' Equity

9 Months Ended

Sep. 30, 2020

Stockholders' Equity Note Disclosure [Text Block]

NOTE 7 – STOCKHOLDERS’ EQUITY

Preferred Stock

On August 31, 2020, the Company issued and sold 85,000 shares of Series A Redeemable Convertible Preferred Stock, par value of $0.0001, (“Preferred Stock”) for $1,000 per share for gross proceeds of $85.0 million. The Preferred Stock has senior and preferential ranking to the Company’s common stock. The Preferred Stock is entitled to cumulative dividends of 6.00% per annum, and for the first two years, the dividends will be paid-in-kind. After the second anniversary of the issuance date, the dividends may be paid-in-kind or be paid in cash at the Company’s option. The Preferred Stock is convertible at any time, at the holder’s election, into a number of shares of common stock of the Company equal to the quotient obtained by dividing the then-current accrued value by the conversion price of $9.50. At any time after the third anniversary of the issuance, the Company may, at its option, convert all, but not less than all, of the Preferred Stock into common stock if the closing price of shares of common stock is at least 150% of the conversion price for 20 out of 30 consecutive trading days. The number of shares of common stock received in such conversion shall be equal to the quotient obtained by dividing the then-current accrued value by the conversion price. At the six-year anniversary of the closing date, each investor has the right to require the Company to repurchase their Preferred Stock and any Preferred Stock not requested to be repurchased shall be converted into common shares of the Company equal to the quotient obtained by dividing the then-current accrued value by the conversion price.

For the three and nine months ended September 30, 2020, the Company recorded $0.4 million in accrued dividends for Preferred Stock.

The Preferred Stock deferred issuance costs was approximately $2.8 million as of September 30, 2020.

As of September 30, 2020, the Preferred Stock could be converted at the option of the holders into approximately 8.9 million shares of the Company’s common stock.

Stock and Warrant Repurchase Plan

The Company’s Board of Directors approved a stock and warrant repurchase plan (“Repurchase Plan”) in November 2015 and increased the repurchase plan to $35.0 million in November 2016. The Repurchase Plan authorizes the Company to purchase, from time to time, the Company’s outstanding common stock and previously outstanding warrants. Any shares purchased will be retired. The Repurchase Plan has no time deadline and will continue until otherwise modified or terminated at the sole discretion of the Company’s Board of Directors. These repurchases exclude shares repurchased to settle statutory employee tax withholding related to the exercise of stock options and vesting of stock awards. Since March 2020, the Repurchase Plan has been suspended due to the uncertain impact of the COVID-19 virus. Prior to its suspension, the Company had repurchased 8,517 shares of common stock for approximately $127,000 during 2020. The Company has cumulatively repurchased 875,218 shares of common stock for $8.3 million and 6,011,926 warrants for $14.7 million since plan inception. All repurchases were made using cash resources. The remaining balance for the Repurchase Plan was $12.0 million as of September 30, 2020.