Accrued Severance and Retention Costs (Details) - USD ($) $ in Thousands		12 Months Ended
	Jul. 21, 2015	Dec. 31, 2015	Mar. 31, 2016
Restructuring Cost and Reserve [Line Items]
Accrued severance and retention costs, current portion		$ 2,639	$ 830
President [Member]
Restructuring Cost and Reserve [Line Items]
Accrued severance and retention costs, current portion	$ 1,046		292
Severance payment period	12 months
Employee Severance [Member] | Retention Plan [Member]
Restructuring Cost and Reserve [Line Items]
Accrued severance and retention costs, current portion			354
Employee Severance [Member] | Research and Development, and Selling, General, and Administrative Expense | Retention Plan [Member]
Restructuring Cost and Reserve [Line Items]
Research and development and selling, general and administrative expense		$ 1,012
Discontinued Operations, Disposed of by Sale [Member] | Services Business [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Remaining severance and retention costs			$ 184