Earnings Per Share (Details) - USD ($)		3 Months Ended		12 Months Ended
	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Weighted average number of shares outstanding reconciliation [Abstract]
Weighted-average shares outstanding - basic (in shares)		12,241,554		12,125,553
Dilution (in shares)		93,083		85,027
Weighted-average share outstanding - diluted (in shares)		12,334,637		12,210,580
Net income available to common stockholders	$ 855,000	$ 1,815,000	$ 855,000	$ 855,000
Net income per share - basic (in dollars per share)		$ 0.15	$ 0.07	$ 0.07
Net income per share - diluted (in dollars per share)		$ 0.15	$ 0.07	$ 0.07
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)		22,000	20,000
Series A Preferred Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)		437,500	437,500