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v3.21.1

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) | Redeemable preferred stock [Member] | Common stock [Member] | Additional paid-in capital [Member] | Retained earnings [Member] | Non controlling interests [Member] | Total
--- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2019 | $ 20,251 | $ 9,029,765 | $ 88,356,509 | $ 66,352,733 | $ 14,193,616 | $ 177,952,874
Balance (in shares) at Dec. 31, 2019 | 33,751 | 15,049,608 |  |  |  |
Issuance of share capital | $ 0 | $ 38,939 | (38,939) | 0 | 0 | 0
Issuance of share capital (in shares) | 0 | 64,898 |  |  |  |
Net income | $ 0 | $ 0 | 0 | 2,888,607 | 360,998 | 3,249,605
Purchase of noncontrolling interests in Aerex and PERC |  |  | (2,444,047) |  | (6,055,953) | (8,500,000)
Dividends declared | 0 | 0 | 0 | (1,289,378) | 0 | (1,289,378)
Stock-based compensation | 0 | 0 | 161,406 | 0 | 0 | 161,406
Balance at Mar. 31, 2020 | $ 20,251 | $ 9,068,704 | 86,034,929 | 67,951,962 | 8,498,661 | 171,574,507
Balance (in shares) at Mar. 31, 2020 | 33,751 | 15,114,506 |  |  |  |
Balance at Dec. 31, 2020 | $ 18,641 | $ 9,086,210 | 86,893,486 | 64,910,709 | 8,103,503 | 169,012,549
Balance (in shares) at Dec. 31, 2020 | 31,068 | 15,143,683 |  |  |  |
Issuance of share capital | $ 0 | $ 34,546 | (34,546) | 0 | 0 | 0
Issuance of share capital (in shares) | 0 | 57,577 |  |  |  |
Conversion of preferred stock | $ (129) | $ 129 |  |  |  |
Conversion of preferred stock (in shares) | (215) | 215 |  |  |  |
Buyback of preferred stock | $ (448) |  | (7,065) |  |  | (7,513)
Buyback of preferred stock (in shares) | (747) |  |  |  |  |
Net income | $ 0 | $ 0 | 0 | 988,772 | 128,793 | 1,117,565
Dividends declared | 0 | 0 | 0 | (1,296,197) | (649,880) | (1,946,077)
Stock-based compensation | 0 | 0 | 176,210 | 0 | 0 | 176,210
Balance at Mar. 31, 2021 | $ 18,064 | $ 9,120,885 | $ 87,028,085 | $ 64,603,284 | $ 7,582,416 | $ 168,352,734
Balance (in shares) at Mar. 31, 2021 | 30,106 | 15,201,475 |  |  |  |

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