Significant Accounting Policies - EPS (Details) - $ / shares		3 Months Ended		6 Months Ended
	Jun. 19, 2017	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	May 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		10,680,000	10,610,000	10,655,000	10,603,000
Incremental shares issuable upon the assumed exercise of stock options		41,000		38,000
Unvested restricted stock		469,000	189,000	462,000	187,000
Shares used to compute diluted earnings per share		11,190,000	10,799,000	11,155,000	10,790,000
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