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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) | Total | Redeemable preferred stock [Member] | Common stock [Member] | Additional paid-in capital [Member] | Retained earnings [Member] | Cumulative translation adjustment [Member] | Non-controlling interests [Member]
--- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2017 | $ 156,021,377 | $ 20,093 | $ 8,951,321 | $ 86,405,387 | $ 53,105,196 | $ (549,555) | $ 8,088,935
Balance (in shares) at Dec. 31, 2017 |  | 33,488 | 14,918,869 |  |  |  |
Issue of share capital | 58,374 | $ 0 | $ 23,991 | 34,383 | 0 | 0 | 0
Issue of share capital (in shares) |  |  | 39,986 |  |  |  |
Conversion of preferred stock | 0 | $ (273) | $ 273 | 0 | 0 | 0 | 0
Conversion of preferred stock (in shares) |  | (454) | 454 |  |  |  |
Net income | 2,058,032 | $ 0 | $ 0 | 0 | 2,092,525 | 0 | (34,493)
Dividends declared | (1,275,961) | 0 | 0 | 0 | (1,275,961) | 0 | 0
Stock-based compensation | 103,521 | 0 | 0 | 103,521 | 0 | 0 | 0
Balance at Mar. 31, 2018 | 156,965,343 | $ 19,820 | $ 8,975,585 | 86,543,291 | 53,921,760 | (549,555) | 8,054,442
Balance (in shares) at Mar. 31, 2018 |  | 33,034 | 14,959,309 |  |  |  |
Issue of share capital | 58,375 | $ 4,446 | $ 0 | 53,929 | 0 | 0 | 0
Issue of share capital (in shares) |  | 7,409 |  |  |  |  |
Net income | 2,396,885 | $ 0 | 0 | 0 | 2,188,193 | 0 | 208,692
Exercise of options | 5,735 | $ 354 | 0 | 5,381 | 0 | 0 | 0
Exercise of options (in shares) |  | 590 |  |  |  |  |
Dividends declared | (1,274,350) | $ 0 | 0 | 0 | (1,274,350) | 0 | 0
Stock-based compensation | 114,944 | 0 | 0 | 114,944 | 0 | 0 | 0
Balance at Jun. 30, 2018 | 158,266,932 | $ 24,620 | $ 8,975,585 | 86,717,545 | 54,835,603 | (549,555) | 8,263,134
Balance (in shares) at Jun. 30, 2018 |  | 41,033 | 14,959,309 |  |  |  |
Balance at Dec. 31, 2018 | 163,755,903 | $ 20,878 | $ 8,989,744 | 87,211,953 | 59,298,161 | (549,555) | 8,784,722
Balance (in shares) at Dec. 31, 2018 |  | 34,796 | 14,982,906 |  |  |  |
Issue of share capital | 78,849 | $ 0 | $ 16,118 | 62,731 | 0 | 0 | 0
Issue of share capital (in shares) |  |  | 26,864 |  |  |  |
Buyback of preferred stock | (17,795) | $ (1,190) | $ 0 | (16,605) | 0 | 0 | 0
Buyback of preferred stock (in shares) |  | (1,983) |  |  |  |  |
Net income | 6,460,339 | $ 0 | 0 | 0 | 6,186,431 | 0 | 273,908
Dividends declared | (1,280,223) | 0 | 0 | 0 | (1,280,223) | 0 | 0
Stock-based compensation | 77,213 | 0 | 0 | 77,213 | 0 | 0 | 0
Balance at Mar. 31, 2019 | 169,074,286 | $ 19,688 | $ 9,005,862 | 87,335,292 | 64,204,369 | (549,555) | 9,058,630
Balance (in shares) at Mar. 31, 2019 |  | 32,813 | 15,009,770 |  |  |  |
Issue of share capital | 81,059 | $ 4,376 | $ 6,344 | 70,339 | 0 | 0 | 0
Issue of share capital (in shares) |  | 7,293 | 10,574 |  |  |  |
Buyback of preferred stock | (6,301) | $ (415) | $ 0 | (5,886) | 0 | 0 | 0
Buyback of preferred stock (in shares) |  | (691) |  |  |  |  |
Net income | 2,941,158 | $ 0 | 0 | 0 | 2,476,262 | 0 | 464,896
Exercise of options | 7,123 | $ 423 | 0 | 6,700 | 0 | 0 | 0
Exercise of options (in shares) |  | 705 |  |  |  |  |
Dividends declared | (1,280,359) | $ 0 | 0 | 0 | (1,280,359) | 0 | 0
Sale of CW-Bali | 790,837 | 0 | 0 | 0 | 0 | 549,555 | 241,282
Stock-based compensation | 127,990 | 0 | 0 | 127,990 | 0 | 0 | 0
Balance at Jun. 30, 2019 | $ 171,735,793 | $ 24,072 | $ 9,012,206 | $ 87,534,435 | $ 65,400,272 | $ 0 | $ 9,764,808
Balance (in shares) at Jun. 30, 2019 |  | 40,120 | 15,020,344 |  |  |  |

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