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Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) | Related Party [Member] Common Stock [Member] Common Class A [Member] | Related Party [Member] Common Stock [Member] Common Class B [Member] | Related Party [Member] Additional Paid-in Capital [Member] | Related Party [Member] Retained Earnings [Member] | Related Party [Member] | Common Stock [Member] Common Class A [Member] | Common Stock [Member] Common Class B [Member] | Additional Paid-in Capital [Member] | Retained Earnings [Member] | Total
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance (in shares) at Dec. 31, 2017 |  |  |  |  |  | 13,307,157 | 1,055,560 |  |  |
Balance at Dec. 31, 2017 |  |  |  |  |  | $ 13,307 | $ 1,056 | $ 158,350,410 | $ (11,211,087) | $ 147,153,686
Stock issued for cash (in shares) | 3,300,000 |  |  |  |  | 521,690 |  |  |  |
Stock issued for cash | $ 3,300 |  | $ 76,886,700 |  | $ 76,890,000 | $ 522 |  | 11,569,463 |  | 11,569,985
Offering costs |  |  |  |  |  |  |  | (1,006,206) |  | (1,006,206)
Net loss attributable to common stockholders |  |  |  |  |  |  |  |  | (2,069,382) | (2,069,382)
Balance (in shares) at Mar. 31, 2018 |  |  |  |  |  | 17,128,847 | 1,055,560 |  |  |
Balance at Mar. 31, 2018 |  |  |  |  |  | $ 17,129 | $ 1,056 | 245,800,367 | (13,280,469) | 232,538,083
Balance (in shares) at Dec. 31, 2017 |  |  |  |  |  | 13,307,157 | 1,055,560 |  |  |
Balance at Dec. 31, 2017 |  |  |  |  |  | $ 13,307 | $ 1,056 | 158,350,410 | (11,211,087) | 147,153,686
Net loss attributable to common stockholders |  |  |  |  |  |  |  |  |  | (3,667,479)
Balance (in shares) at Jun. 30, 2018 |  |  |  |  |  | 20,894,774 | 1,055,560 |  |  |
Balance at Jun. 30, 2018 |  |  |  |  |  | $ 20,895 | $ 1,056 | 332,907,911 | (14,878,566) | 318,051,296
Balance (in shares) at Mar. 31, 2018 |  |  |  |  |  | 17,128,847 | 1,055,560 |  |  |
Balance at Mar. 31, 2018 |  |  |  |  |  | $ 17,129 | $ 1,056 | 245,800,367 | (13,280,469) | 232,538,083
Stock issued for cash (in shares) | 3,137,768 |  |  |  |  | 628,159 |  |  |  |
Stock issued for cash | $ 3,138 |  | $ 73,106,862 |  | $ 73,110,000 | $ 628 |  | 14,516,670 |  | 14,517,298
Offering costs |  |  |  |  |  |  |  | (515,988) |  | (515,988)
Net loss attributable to common stockholders |  |  |  |  |  |  |  |  | (1,598,097) | (1,598,097)
Balance (in shares) at Jun. 30, 2018 |  |  |  |  |  | 20,894,774 | 1,055,560 |  |  |
Balance at Jun. 30, 2018 |  |  |  |  |  | $ 20,895 | $ 1,056 | 332,907,911 | (14,878,566) | 318,051,296
Balance (in shares) at Dec. 31, 2018 |  |  |  |  |  | 21,029,324 | 1,055,560 |  |  |
Balance at Dec. 31, 2018 |  |  |  |  |  | $ 21,029 | $ 1,056 | 335,518,323 | (20,325,024) | 315,215,384
Stock issued for cash (in shares) |  |  |  |  |  | 154,003 |  |  |  |
Stock issued for cash |  |  |  |  |  | $ 154 |  | 3,864,547 |  | 3,864,701
Offering costs |  |  |  |  |  |  |  | (124,563) |  | (124,563)
Net loss attributable to common stockholders |  |  |  |  |  |  |  |  | (4,078,386) | (4,078,386)
Increase in redeemable noncontrolling interest |  |  |  |  |  |  |  | (136,483) |  | (136,483)
Balance (in shares) at Mar. 31, 2019 |  |  |  |  |  | 21,183,327 | 1,055,560 |  |  |
Balance at Mar. 31, 2019 |  |  |  |  |  | $ 21,183 | $ 1,056 | 339,121,824 | (24,403,410) | 314,740,653
Balance (in shares) at Dec. 31, 2018 |  |  |  |  |  | 21,029,324 | 1,055,560 |  |  |
Balance at Dec. 31, 2018 |  |  |  |  |  | $ 21,029 | $ 1,056 | 335,518,323 | (20,325,024) | 315,215,384
Net loss attributable to common stockholders |  |  |  |  |  |  |  |  |  | (6,192,734)
Balance (in shares) at Jun. 30, 2019 |  |  |  |  |  | 21,619,321 | 1,055,560 |  |  |
Balance at Jun. 30, 2019 |  |  |  |  |  | $ 21,619 | $ 1,056 | 349,402,987 | (26,517,758) | 322,907,904
Balance (in shares) at Mar. 31, 2019 |  |  |  |  |  | 21,183,327 | 1,055,560 |  |  |
Balance at Mar. 31, 2019 |  |  |  |  |  | $ 21,183 | $ 1,056 | 339,121,824 | (24,403,410) | 314,740,653
Stock issued for cash (in shares) |  |  |  |  |  | 435,994 |  |  |  |
Stock issued for cash |  |  |  |  |  | $ 436 |  | 10,741,720 |  | 10,742,156
Offering costs |  |  |  |  |  |  |  | (325,952) |  | (325,952)
Net loss attributable to common stockholders |  |  |  |  |  |  |  |  | (2,114,348) | (2,114,348)
Increase in redeemable noncontrolling interest |  |  |  |  |  |  |  | (134,605) |  | (134,605)
Balance (in shares) at Jun. 30, 2019 |  |  |  |  |  | 21,619,321 | 1,055,560 |  |  |
Balance at Jun. 30, 2019 |  |  |  |  |  | $ 21,619 | $ 1,056 | $ 349,402,987 | $ (26,517,758) | $ 322,907,904

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