Employee Benefit Plans (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Classification of liabilities in the Consolidated Balance Sheets
Current liabilities	$ 837,000	$ 638,000
Total liabilities	4,160,000	4,054,000
Plan expenses	700,000	600,000	600,000
Accrued compensation
Classification of liabilities in the Consolidated Balance Sheets
Current liabilities	837,000	638,000
Other long-term liabilities
Classification of liabilities in the Consolidated Balance Sheets
Long-term liabilities	$ 3,323,000	$ 3,416,000