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Note 14 - Equity | 9 Months Ended
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Sep. 30, 2022
Notes to Financial Statements |
Stockholders' Equity Note Disclosure [Text Block] | 14. Equity The tables below present changes in stockholders' equity for the three and nine months ended September 30, 2022 and 2021.
|  | Common Stock |  |  | Additional Paid-in |  |  | Accumulated |  |  | Other Comprehensive |  |  | Total Stockholders' |
|  | Shares |  |  | Amount |  |  | Capital |  |  | Deficit |  |  | Income |  |  | Equity |
Balances at June 30, 2022 |  |  | 73,024,147 |  |  | $ | 7,302 |  |  | $ | 232,942,666 |  |  | $ | (93,181,114 | ) |  | $ | — |  |  | $ | 139,768,854 |
Net income |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 33,040,588 |  |  |  | — |  |  |  | 33,040,588 |
Stock-based compensation |  |  | — |  |  |  | — |  |  |  | 328,685 |  |  |  | — |  |  |  | — |  |  |  | 328,685 |
Balances at September 30, 2022 |  |  | 73,024,147 |  |  | $ | 7,302 |  |  | $ | 233,271,351 |  |  | $ | (60,140,526 | ) |  | $ | — |  |  | $ | 173,138,127 |
|  | Common Stock |  |  | Additional Paid-in |  |  | Accumulated |  |  | Other Comprehensive |  |  | Total Stockholders' |
|  | Shares |  |  | Amount |  |  | Capital |  |  | Deficit |  |  | Income |  |  | Equity |
Balances at December 31, 2021 |  |  | 73,543,602 |  |  | $ | 7,354 |  |  | $ | 226,070,308 |  |  | $ | (51,763,255 | ) |  | $ | — |  |  | $ | 174,314,407 |
Net income |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 34,716,600 |  |  |  | — |  |  |  | 34,716,600 |
Repurchase of common stock |  |  | (1,474,781 | ) |  |  | (147 | ) |  |  | — |  |  |  | (10,149,557 | ) |  |  | — |  |  |  | (10,149,704 | )
Payment of common stock tendered for employee stock-based compensation tax obligations |  |  | (1,973 | ) |  |  | — |  |  |  | (12,533 | ) |  |  | — |  |  |  | — |  |  |  | (12,533 | )
Issuance of common stock upon vesting of RSUs |  |  | 132,396 |  |  |  | 13 |  |  |  | (13 | ) |  |  | — |  |  |  | — |  |  |  | — |
Issuance of common stock upon exercise of warrants |  |  | 824,903 |  |  |  | 82 |  |  |  | 6,120,696 |  |  |  | — |  |  |  | — |  |  |  | 6,120,778 |
Cash dividend ($0.45 per share) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (32,944,314 | ) |  |  | — |  |  |  | (32,944,314 | )
Stock-based compensation |  |  | — |  |  |  | — |  |  |  | 1,092,893 |  |  |  | — |  |  |  | — |  |  |  | 1,092,893 |
Balances at September 30, 2022 |  |  | 73,024,147 |  |  | $ | 7,302 |  |  | $ | 233,271,351 |  |  | $ | (60,140,526 | ) |  | $ | — |  |  | $ | 173,138,127 |
|  | Common Stock |  |  | Additional Paid-in |  |  | Accumulated |  |  | Other Comprehensive |  |  | Total Stockholders' |
|  | Shares |  |  | Amount |  |  | Capital |  |  | Deficit |  |  | Income |  |  | Equity |
Balances at June 30, 2021 |  |  | 75,389,417 |  |  | $ | 7,539 |  |  | $ | 225,678,876 |  |  | $ | (108,965,453 | ) |  | $ | — |  |  | $ | 116,720,962 |
Net loss |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (3,113,358 | ) |  |  | — |  |  |  | (3,113,358 | )
Repurchase of common stock |  |  | (1,110,763 | ) |  |  | (111 | ) |  |  | — |  |  |  | (7,134,577 | ) |  |  | — |  |  |  | (7,134,688 | )
Payment of common stock tendered for employee stock-based compensation tax obligations |  |  | (25,203 | ) |  |  | (2 | ) |  |  | (160,554 | ) |  |  | — |  |  |  | — |  |  |  | (160,556 | )
Issuance of common stock upon vesting of RSUs |  |  | 53,334 |  |  |  | 5 |  |  |  | (5 | ) |  |  | — |  |  |  | — |  |  |  | — |
Stock-based compensation |  |  | — |  |  |  | — |  |  |  | 243,502 |  |  |  | — |  |  |  | — |  |  |  | 243,502 |
Balances at September 30, 2021 |  |  | 74,306,785 |  |  | $ | 7,431 |  |  | $ | 225,761,819 |  |  | $ | (119,213,388 | ) |  | $ | — |  |  | $ | 106,555,862 |
|  | Common Stock |  |  | Additional Paid-in |  |  | Accumulated |  |  | Other Comprehensive |  |  | Total Stockholders' |
|  | Shares |  |  | Amount |  |  | Capital |  |  | Deficit |  |  | Income |  |  | Equity |
Balances at December 31, 2020 |  |  | 77,195,704 |  |  | $ | 7,720 |  |  | $ | 224,978,430 |  |  | $ | (95,192,881 | ) |  | $ | — |  |  | $ | 129,793,269 |
Net loss |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (3,756,262 | ) |  |  | — |  |  |  | (3,756,262 | )
Repurchase of common stock |  |  | (3,024,690 | ) |  |  | (302 | ) |  |  | — |  |  |  | (20,264,245 | ) |  |  | — |  |  |  | (20,264,547 | )
Payment of common stock tendered for employee stock-based compensation tax obligations |  |  | (27,105 | ) |  |  | (3 | ) |  |  | (173,915 | ) |  |  | — |  |  |  | — |  |  |  | (173,918 | )
Issuance of common stock upon vesting of RSUs |  |  | 162,876 |  |  |  | 16 |  |  |  | (16 | ) |  |  | — |  |  |  | — |  |  |  | — |
Stock-based compensation |  |  | — |  |  |  | — |  |  |  | 957,320 |  |  |  | — |  |  |  | — |  |  |  | 957,320 |
Balances at September 30, 2021 |  |  | 74,306,785 |  |  | $ | 7,431 |  |  | $ | 225,761,819 |  |  | $ | (119,213,388 | ) |  | $ | — |  |  | $ | 106,555,862 |
On August 2, 2021, the Company's Board of Directors authorized a share repurchase program ("New Repurchase Authorization") under which the Company may repurchase up to $50 million of the Company's common stock through December 31, 2023. The Company started repurchasing shares under this program in the fourth quarter of 2021. Repurchases under the New Repurchase Authorization may be made from time to time at the Company's discretion in open market transactions, through block trades, in privately negotiated transactions and pursuant to any trading plan that may be adopted by the Company's management in accordance with Rule 10b5-1 under the Securities Exchange Act of 1934, as amended (the "Exchange Act") or otherwise. The timing and actual number of shares repurchased will depend on a variety of factors, including: timing of procurement orders under government contracts; alternative opportunities for strategic uses of cash; the stock price of the Company’s common stock; market conditions; alternative capital management uses of cash; and other corporate liquidity requirements and priorities. During the nine months ended September 30, 2022, the Company repurchased approximately 1.5 million shares of common stock under the New Repurchase Authorization for approximately $10.1 million. No shares were repurchased in the three months ended September 30, 2022. Prior to the effective date of the New Repurchase Authorization, the Company repurchased shares under a program that was announced in March 2020. Under this program, $50 million of the Company's common stock was repurchased, including approximately 1.1 million shares of common stock for approximately $7.1 million that was repurchased during the three months ended September 30, 2021, and 3.0 million shares of common stock for approximately $20.3 million that was repurchased during the nine months ended September 30, 2021. On May 5, 2022, the Board of Directors declared a special dividend of $0.45 per share on the common stock of the Company, which resulted in an overall dividend payment of $32.9 million. The special dividend was paid on June 2, 2022 to shareholders of record at the close of business on May 17, 2022.

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