Annual report pursuant to Section 13 and 15(d)

Goodwill and Intangible Assets (Details Textual)

v3.3.0.814
Goodwill and Intangible Assets (Details Textual) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2014
Sep. 30, 2014
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2013
Sep. 01, 2014
Goodwill [Line Items]            
Goodwill     $ 0 $ 31,997 [1],[2] $ 0  
Goodwill impairment $ 20,547 $ 11,450 [2] 31,997 [2]   2,884  
Finite-Lived Intangible Assets, Net     25,942 32,319 [1]    
Indefinite-lived Intangible Assets, Impairment Losses       0 0  
Intangible amortization     6,377 4,889 887  
Impairment of Intangible Assets (Excluding Goodwill)     $ 100      
Minimum [Member]            
Goodwill [Line Items]            
Finite-Lived Intangible Asset, Useful Life     2 years      
Maximum [Member]            
Goodwill [Line Items]            
Finite-Lived Intangible Asset, Useful Life     10 years      
Product Technology [Member]            
Goodwill [Line Items]            
Finite-Lived Intangible Assets, Net     $ 7,864 9,864 [1]    
Product Technology [Member] | Noran Tel [Member]            
Goodwill [Line Items]            
Impairment of Intangible Assets, Finite-lived       200    
Finite-Lived Intangible Assets, Net       200    
Finite-Lived Intangible Asset, Useful Life     2 years      
IBW [Member]            
Goodwill [Line Items]            
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount           13.00%
Goodwill   $ 20,500 $ 0 $ 0 $ 0  
Goodwill impairment     $ 20,547      
[1] Certain amounts have been adjusted to reflect measurement period adjustments related to the CSI acquisition (see Note 2).
[2] See Note 1 for restatement information.