Significant Events Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions					9 Months Ended
	Sep. 02, 2016	Aug. 05, 2016	Jun. 07, 2016	Mar. 02, 2016	Nov. 30, 2016	Apr. 04, 2016
Business Acquisition [Line Items]
Number Of Preferred Stock Converted Into Common Stock						2.80
Proposed Merger Per Share Amount		$ 4.10
Potential Going Private Transaction Costs					$ 0.9
Digonex [Member]
Business Acquisition [Line Items]
Business Combination, Additional Convertible Rights Acquired, Total Equity Interest in Acquiree, Percentage					79.00%
Investments in Consolidated Subsidiary	$ 0.5		$ 0.5	$ 0.5