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Note 8 - Stockholders' Equity | 3 Months Ended
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Mar. 31, 2020
Notes to Financial Statements |
Stockholders' Equity Note Disclosure [Text Block] | Note 8. Stockholders’ Equity Stock-based Compensation Plans We periodically grant restricted stock unit awards, performance-based shares and shares of common stock to our employees and directors. We measure compensation cost for restricted stock units and stock grants at the closing price of our stock at the time of grant. We measure compensation cost for performance-based grants using a Monte Carlo simulation to estimate their value at grant date. Restricted stock unit and performance-based share grants vest after a specified period with compensation cost amortized over that period. Although we have no current plans to issue stock options, we may do so in the future. In March 2020, the Board of Directors granted 2,800,062 shares of common stock to employees for payment of long-term incentive compensation for the period ended December 31, 2019. The shares were distributed in April 2020, and $5.1 million in expense related to the stock awards was recognized in the periods prior to March 31, 2020. Stock-based compensation expense for restricted stock unit and performance-based grants to employees and shares issued to nonemployee directors totaled $1.2 million for the first three months of 2020 and $1.6 million for the first three months of 2019. Common Stock Dividends In September 2011 and February 2012, our Board of Directors adopted a common stock dividend policy that has two components: (1) a dividend that links the amount of dividends on our common stock to our average quarterly realized silver price in the preceding quarter, and (2) a minimum annual dividend of $0.01 per share of common stock, in each case, payable quarterly, if and when declared. For illustrative purposes only, the table below summarizes potential per share dividend amounts at different quarterly average realized price levels according to the first component of the policy:
Quarterly average realized silver price per ounce |  | Quarterly dividend per share |  | Annualized dividend per share
$30 |  | $0.01 |  | $0.04
$35 |  | $0.02 |  | $0.08
$40 |  | $0.03 |  | $0.12
$45 |  | $0.04 |  | $0.16
$50 |  | $0.05 |  | $0.20
On February 21, 2020, our Board of Directors declared a common stock dividend, pursuant to the minimum annual dividend component of the policy described above, of $0.0025 per share, for a total dividend of approximately $1.3 million paid in March 2020. Because the average realized silver price for the fourth quarter of 2019 was $17.47 per ounce, below the minimum threshold of $30 according to the policy, no silver-price-linked component was declared or paid. The declaration and payment of common stock dividends is at the sole discretion of our Board of Directors. Common Stock Repurchase Program On May 8, 2012, we announced that our Board of Directors approved a stock repurchase program. Under the program, we are authorized to repurchase up to 20 million shares of our outstanding common stock from time to time in open market or privately negotiated transactions, depending on prevailing market conditions and other factors. The repurchase program may be modified, suspended or discontinued by us at any time. Whether or not we engage in repurchases from time to time may depend on a variety of factors, including not only price and cash resources, but customary black-out restrictions, whether we have any material inside information, limitations on share repurchases or cash usage that may be imposed by our credit agreement or in connection with issuances of securities, alternative uses for cash, applicable law, and other investment opportunities from time to time. As of March 31, 2020, 934,100 shares had been purchased at an average price of $3.99 per share, leaving approximately 19.1 million shares that may yet be purchased under the program. The closing price of our common stock at May 5, 2020, was $2.64 per share. No shares were purchased under the program during the first quarter of 2020. Warrants We issued 4,136,000 warrants to purchase one share of our common stock to holders of warrants to purchase Klondex common stock under the terms of the Klondex acquisition, and all of the warrants were outstanding as of March 31, 2020. Warrants to purchase 2,068,000 shares of common stock have an exercise price of $8.02 and expire in April 2032. Warrants to purchase 2,068,000 shares of common stock have an exercise price of $1.57 and expire in February 2029.

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- Definition The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(e)(1)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -URI http://asc.fasb.org/topic&trid=2208762 + Details
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