Significant Accounting Policies - EPS (Details) - $ / shares		3 Months Ended		9 Months Ended
	Sep. 18, 2017	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Jul. 31, 2017	Dec. 31, 2016
Schedule of reconciliation of shares used to calculate basic and diluted earnings per share
Weighted average shares outstanding used to compute basic earnings per share		10,701,000	10,616,000	10,671,000	10,608,000
Incremental shares issuable upon the assumed exercise of stock options		38,000		38,000
Unvested restricted stock		471,000	212,000	465,000	195,000
Shares used to compute diluted earnings per share		11,210,000	10,828,000	11,174,000	10,803,000
Common stock, shares authorized		20,000,000		20,000,000			20,000,000
Common stock, par value		$ 0.01		$ 0.01			$ 0.01
Common stock, shares issued		11,167,425		11,167,425			11,093,489
Common stock, shares outstanding		11,167,425		11,167,425			11,093,489
Preferred stock, shares authorized		8,000,000		8,000,000			8,000,000
Preferred stock, shares issued		0		0			0
Preferred stock, shares outstanding		0		0			0
Dividends declared, per share						$ 0.25
Dividends paid, per share	$ 0.25