Summary of Significant Accounting Policies (Details 2) - shares	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Summary of Significant Accounting Policies
Denominator for basic net loss per share - weighted average shares	1,798,000	1,786,000
Effect of dilutive securities: stock options, restricted stock and restricted stock units	4,000	8,000
Denominator for diluted net loss per share - weighted average shares	1,802,000	1,794,000