Leadership Changes and Restructuring Activities (Details) - USD ($)	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2015	Dec. 31, 2014
Restructuring Plan
Severance, separation and restructuring
Expenses related to severance and outplacement services			$ 1,303,000
Former Chief Executive Officer Member | Separation Agreement
Severance, separation and restructuring
Benefit period		36 months
Restructuring and related cost, cost incurred during end of year	$ 154,000	$ 605,000	3,545,000
Severance and other reserve, short-term portion	640,000	640,000	500,000
Severance and other reserve, long-term portion	1,151,000	1,151,000	1,488,000
Severance and other related expenses	154,000	$ 605,000	$ 3,545,000
President Emeritus [Member] | Retirement Agreement
Severance, separation and restructuring
Benefit period		24 months
Restructuring and related cost, cost incurred during end of year	434,000	$ 434,000
Restructuring and related total cost excepted to incur	877,000	877,000
Equity-based compensation liability	216,000	216,000
Severance and other reserve, short-term portion	206,000	206,000
Severance and other reserve, long-term portion	294,000	294,000
Severance and other related expenses	$ 434,000	$ 434,000