Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements (Details Textual)

v3.7.0.1
Fair Value Measurements (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Sep. 30, 2014
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2014
Long Lived Assets Held-for-sale [Line Items]        
Loss on disposal of property and equipment   $ (6) $ (31)  
Mundelein Facility [Member] | Level II [Member]        
Long Lived Assets Held-for-sale [Line Items]        
Asset held-for-sale book value       $ 3,600
Loss on disposal of property and equipment $ 2,200      
Asset held-for-sale at fair value   $ 1,400