Stock-based Compensation (Detail Textuals 3) - USD ($)	6 Months Ended		12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Restricted Stock Agreements
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Numbers of shares surrendered (in shares)	2,562		5,821
Stock-based employee compensation	$ 593,000	$ 306,000
Unrecognized compensation cost	$ 3,800,000
Remaining vesting period over which cost expected to be recognized	4 years
Stock option agreements
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Numbers of shares surrendered (in shares)	170