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Stockholders Equity (Details 1) - Stock Option [Member] | 6 Months Ended
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Jun. 30, 2021 USD ($) $ / shares shares
Number of Shares, Outstanding, Beginning Balance | shares | 119,966
Number of Shares, Outstanding, Expired | shares | (12,000)
Number of Shares, Outstanding, Ending Balance | shares | 107,966
Number of Shares, Outstanding, Vested and Exercisable | shares | 27,500
Weighted Average Exercise Price per Share, Outstanding, Beginning Balance | $ / shares | $ 8.26
Weighted Average Exercise Price per Share, Outstanding, Expired | $ / shares | 7.85
Weighted Average Exercise Price per Share, Outstanding, Ending Balance | $ / shares | 8.31
Weighted Average Exercise Price per Share, Outstanding, Vested and Exercisable | $ / shares | $ 8.64
Weighted Average Remaining Contractual Term, Beginning Balance | 3 years 6 months 18 days
Weighted Average Remaining Contractual Term, Ending Balance | 3 years 5 months 4 days
Weighted Average Remaining Contractual Term, Vested and Exercisable | 2 years 11 months 8 days
Aggregate Intrinsic Value, Beginning Balance | $ | $ 0
Aggregate Intrinsic Value, Ending Balance | $ | 0
Aggregate Intrinsic Value, Vested and Exercisable | $ | $ 0

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