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Consolidated Statements of Stockholders' Equity - USD ($) | Common Stock [Member] | Additional Paid-in Capital [Member] | Treasury Stock [Member] | AOCI Attributable to Parent [Member] | Retained Earnings [Member] | Total Kopin Corporation Stockholders Equity [Member] | Noncontrolling Interest [Member] | Total
--- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning balance, value at Dec. 30, 2017 | $ 775,720 | $ 329,917,858 | $ (17,238,669) | $ 3,564,779 | $ (240,256,502) | $ 76,763,186 | $ 616,661 | $ 77,379,847
Balance, shares at Dec. 30, 2017 | 77,572,038 |  |  |  |  |  |  |
Vesting of restricted stock | $ 10,930 | (10,930) |  |  |  |  |  |
Vesting of restricted stock, shares | 1,093,000 |  |  |  |  |  |  |
Stock-based compensation expense |  | 4,791,054 |  |  |  | 4,791,054 |  | 4,791,054
Other comprehensive loss |  |  |  | (2,010,192) |  | (2,010,192) | (117,659) | (2,127,851)
Restricted stock for tax withholding obligations | $ (1,430) | (206,585) |  |  |  | (208,015) |  | (208,015)
Restricted stock for tax withholding obligations, shares | (142,972) |  |  |  |  |  |  |
Distribution to noncontrolling interest holder |  |  |  |  |  |  | (699,105) | (699,105)
Adoption of accounting standard |  |  |  |  | 3,059,383 | 3,059,383 |  | 3,059,383
Net loss |  |  |  |  | (34,533,542) | (34,533,542) | 51,050 | (34,482,492)
Ending balance, value at Dec. 29, 2018 | $ 785,220 | 334,491,397 | (17,238,669) | 1,554,587 | (271,730,661) | 47,861,874 | (149,053) | 47,712,821
Balance, shares at Dec. 29, 2018 | 78,522,066 |  |  |  |  |  |  |
Vesting of restricted stock | $ 6,345 | (6,345) |  |  |  |  |  |
Vesting of restricted stock, shares | 634,511 |  |  |  |  |  |  |
Stock-based compensation expense |  | 2,057,400 |  |  |  | 2,057,400 |  | 2,057,400
Other comprehensive loss |  |  |  | 202,597 |  | 202,597 |  | 202,597
Restricted stock for tax withholding obligations | $ (861) | (44,652) |  |  |  | (45,513) |  | (45,513)
Restricted stock for tax withholding obligations, shares | (86,086) |  |  |  |  |  |  |
Sale of registered stock, net of costs | $ 79,792 | 7,958,737 |  |  |  | 8,038,529 |  | 8,038,529
Sale of registered stock, shares | 7,979,181 |  |  |  |  |  |  |
Net loss |  |  |  |  | (29,506,252) | (29,506,252) | 132,030 | (29,374,222)
Ending balance, value at Dec. 28, 2019 | $ 870,496 | 344,456,537 | (17,238,669) | 1,757,184 | (301,236,913) | 28,608,635 | (17,023) | 28,591,612
Balance, shares at Dec. 28, 2019 | 87,049,672 |  |  |  |  |  |  |
Vesting of restricted stock | $ 10,387 | (10,387) |  |  |  |  |  |
Vesting of restricted stock, shares | 1,038,655 |  |  |  |  |  |  |
Stock-based compensation expense |  | 821,122 |  |  |  | 821,122 |  | 821,122
Other comprehensive loss |  |  |  | (272,750) |  | (272,750) |  | (272,750)
Restricted stock for tax withholding obligations | $ (808) | (139,118) |  |  |  | (139,926) |  | (139,926)
Restricted stock for tax withholding obligations, shares | (80,792) |  |  |  |  |  |  |
Sale of treasury stock, net of costs |  | (3,615,261) | 7,444,723 |  |  | 3,829,462 |  | 3,829,462
Net loss |  |  |  |  | (4,411,112) | (4,411,112) | (119,813) | (4,530,925)
Ending balance, value at Dec. 26, 2020 | $ 880,075 | $ 341,512,893 | $ (9,793,946) | $ 1,484,434 | $ (305,648,025) | $ 28,435,431 | $ (136,836) | $ 28,298,595
Balance, shares at Dec. 26, 2020 | 88,007,535 |  |  |  |  |  |  |

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