Stockholders' Equity (Stock Option Activities) (Details) - USD ($)	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Options vested and expected to vest, Number of shares	1,053,490	1,410,501
Number of shares, Exercised		(100,000)
Number of shares, Forfeited	(35,000)	(257,011)
Options vested and expected to vest, Number of shares	1,018,490	1,053,490	1,410,501
Options vested and exercisable, Number of shares	1,018,490
Options vested and expected to vest, Weighted average exercise price	$ 5.02	$ 4.30
Weighted average exercise price, Exercised		1.18
Weighted average exercise price, Forfeited	4.33	2.57
Options vested and expected to vest, Weighted average exercise price	5.04	$ 5.02	$ 4.30
Options vested and exercisable, Weighted average exercise price	$ 5.04
Total weighted average intrinsic value, Options vested and expected to vest	$ 647,482	$ 684,752
Total weighted average intrinsic value, Options vested and expected to vest	368,344	$ 647,482	$ 684,752
Total weighted average intrinsic value, Options vested and exercisable	$ 368,344
Options vested and expected to vest, Weighted average contractual life	1 year 8 months 4 days	2 years 7 months 17 days	2 years 3 months 29 days
Options vested and exercisable, Weighted average remaining contractual life (years)	1 year 8 months 4 days

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest exercisable or convertible options. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Number of fully vested and expected to vest exercisable options that may be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted-average exercise price, at which grantee can acquire shares reserved for issuance, for fully vested and expected to vest exercisable or convertible options. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Number of fully vested and expected to vest options outstanding that can be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted-average exercise price, at which grantee can acquire shares reserved for issuance, for fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Weighted average remaining contractual term for fully vested and expected to vest exercisable or convertible options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted average remaining contractual term for fully vested and expected to vest options outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Number of share options (or share units) exercised during the current period.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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