Investment in an affiliate (Tables)

12 Months Ended

Dec. 31, 2015

Investments in and Advances to Affiliates, Schedule of Investments [Abstract]

Summary of Unaduited Financial Information

Summarized unaudited financial information of ENS as of and for the year ended December 31, 2015 follows:

	December 31, 2015 (unaudited)
Financial position
Current assets		37,857
Property, plant, and equipment, net		3,795
Other assets		3,143
Total assets	$	44,795
Current liabilities		3,493
Long-term debt		14,178
Total liabilities		17,671
Stockholders’ equity		27,124
Total liabilities and stockholders’ equity	$	44,795

	July 1, 2015 through December 31, 2015* (unaudited)
Sales	$	655
Net loss		(8,352	)
Net loss attributed to noncontrolling interest		(149	)
Net loss attributed to the shareholders of ENS	$	(8,203	)
Preferred stock dividend		(147	)
Net loss attribute to common stockholders of ENS	$	(8,350	)
Net loss attributable to the Company	$	(1,403	)

* The results of ENS during the period from July 1, 2015 to July 13, 2015, the date of acquisition of the Purchased Common Stock is considered to be immaterial.

Schedule of Difference between Carrying Value of Investment in Purchased Common Stock and Underlying Equity in Net Assets

The difference between the carrying value of the Company’s investment in the Purchased Common Stock and the amount of the underlying equity in the net assets of ENS is as follows:

	December 31, 2015
Underlying equity in net assets of ENS (16.8% of net assets of ENS)	$	4,285
Difference between the cost of investment and the underlying equity in net assets		(2,444	)
Investment in Purchased Common Stock	$	1,841