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Stock Options - Summary of Status of Stock Options Exercised, Including Substantive Options (Details)	3 Months Ended
	Mar. 31, 2021 $ / shares shares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Number of shares Outstanding, Beginning Balance | shares	53,277
Number of shares, Exercised | shares	(29,500)
Number of shares Outstanding, Ending Balance | shares	23,777
Weighted Average Exercise Price, Beginning Balance | $ / shares	$ 5.87
Weighted Average Exercise Price, Exercised | $ / shares	5.53
Weighted Average Exercise Price, Ending Balance | $ / shares	$ 6.29

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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

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

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