Stockholders' Equity (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jan. 29, 2014
Stockholders Equity
Maximum number of shares authorized for grant	1,500,000
Additional disclosure
Compensation expense (in dollars)	$ 278,000	$ 291,000	$ 313,000
Restricted Stock
Stockholders Equity
Vesting rights percentage each year beginning on the second anniversary date of the grant	20.00%
Service period over which the aggregate market value of stock is being amortized	6 years
Number of Shares
Nonvested at the beginning of the period (in shares)	574,000
Granted (in shares)	151,000
Vested (in shares)	(139,200)
Nonvested at the end of the period (in shares)	585,800	574,000
Weighted Average Grant Date Fair Value
Nonvested at the beginning of the period (in dollars per share)	$ 1.77
Granted (in dollars per share)	$ 2.50	$ 1.80	$ 1.04
Vested (in dollars per share)	$ 2.28
Nonvested at the end of the period (in dollars per share)	$ 1.84	$ 1.77
Additional disclosure
Total fair value of shares vested during the period (in dollars)	318,000	394,000	474,000
Compensation expense (in dollars)	278,000	291,000	313,000
Total unrecognized compensation cost (in dollars)	$ 601,000
Weighted-average period for recognition of total unrecognized compensation cost	3 years 10 months 24 days
Stock Options
Stockholders Equity
Maximum number of shares authorized for grant				2,000,000
Options granted (in shares)	151,000	153,000