Summary of Significant Accounting Policies (Details 2) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Summary of Significant Accounting Policies
Denominator for basic net loss per share - weighted average shares	1,798,000	1,788,000	1,798,000	1,787,000
Effect of dilutive securities: stock options, restricted stock and restricted stock units	0	0	4,000	0
Denominator for diluted net loss per share - weighted average shares	1,798,000	1,788,000	1,802,000	1,787,000