Shareholders' Equity (Details) - USD ($)	6 Months Ended	13 Months Ended
	Jun. 30, 2017	Jun. 30, 2017	Jul. 14, 2016	Jun. 15, 2016
Stock Repurchase Program [Abstract]
Stock repurchase program authorized amount	$ 14,500,000	$ 14,500,000
Additional amount approved			$ 4,500,000	$ 2,000,000
Treasury stock shares acquired (in shares)	11,500
Amount paid to repurchase shares during the year	$ 206,000
Treasury stock, shares, acquired (in shares)		$ 12,100,000
Number of common stock acquired (in shares)	1,070,000	1,070,000
Number of shares issued to management (in shares)	11,000