Leadership Changes and Restructuring Activities (Details) - USD ($)	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2015	Dec. 31, 2014
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	$ 503,000	$ 1,542,000	$ 3,545,000
Severance and other reserve, short-term portion	829,000	829,000	500,000
Severance and other reserve, long-term portion	980,000	980,000	1,488,000
Severance and other related expenses	503,000	$ 1,542,000	$ 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	443,000
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	248,000	248,000
Severance and other reserve, long-term portion	237,000	$ 237,000
Severance and other related expenses	$ 443,000