Stockholders' Equity - Schedule of Share-based Compensation, Shares Authorized Under Stock Option Plans, by Exercise Price Range (Details)	3 Months Ended
	Mar. 31, 2021 $ / shares shares
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Options Outstanding, Number of shares | shares	78,550
Options Exercisable, Number of shares | shares	78,550
Exercise Price Range 1 [Member]
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Exercise Price Range, Lower Range Limit	$ 2.00
Exercise Price Range, Upper Range Limit	$ 4.00
Options Outstanding, Number of shares | shares	63,684
Options Outstanding, Weighted Average Remaining Life (Years)	7 months 13 days
Options Outstanding, Weighted Average Exercise Price	$ 3.21
Options Exercisable, Number of shares | shares	63,684
Options Exercisable, Weighted Average Exercise Price	$ 3.21
Exercise Price Range 2 [Member]
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Exercise Price Range, Lower Range Limit	4.20
Exercise Price Range, Upper Range Limit	$ 6.68
Options Outstanding, Number of shares | shares	14,866
Options Outstanding, Weighted Average Remaining Life (Years)	7 months 24 days
Options Outstanding, Weighted Average Exercise Price	$ 4.46
Options Exercisable, Number of shares | shares	14,866
Options Exercisable, Weighted Average Exercise Price	$ 4.46