Earnings Per share (Calculation of basic and diluted EPS) (Details) - USD ($)	3 Months Ended			6 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Earnings Per Share ("EPS") [Abstract]
Income (loss) from continuing operations	$ (511,453)		$ 62,113	$ (809,890)	$ (322,035)
Net income (loss)	$ (511,453)	$ 298,436	$ 62,113	$ (809,890)	$ (322,035)
Basic EPS:
Weighted average common shares outstanding	2,820,999		2,816,639	2,819,915	2,816,392
Earnings (loss) per share - basic
Continuing operations	$ (0.18)		$ 0.02	$ (0.29)	$ (0.11)
Consolidated basic EPS	$ (0.18)		$ 0.02	$ (0.29)	$ (0.11)
Diluted EPS:
Weighted average common shares outstanding	2,820,999		2,816,639	2,819,915	2,816,392
Assumed conversion of net common shares issuable under stock option plans			70,981
Assumed conversion of net common shares issuable under warrants			12,873
Weighted average common and common equivalent shares outstanding, diluted	2,820,999		2,900,493	2,819,915	2,816,392
Earnings (loss) per share - diluted
Continuing operations	$ (0.18)		$ 0.02	$ (0.29)	$ (0.11)
Consolidated diluted EPS	$ (0.18)		$ 0.02	$ (0.29)	$ (0.11)