INTANGIBLE ASSETS

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible assets are composed of internally developed software. Intangible assets are amortized on a straight‑line basis with a useful life of five years. Amortization expense included in net income (loss) for the years ended December 31, 2017, 2016 and 2015 was $0.3 million, $0.3 million and $0.3 million, respectively. At December 31, 2017 and 2016, respectively, the company’s intangible assets subject to amortization are as follows:



($ in thousands)	2017		2016
Internally developed software	$	1,440	$	1,440
Less accumulated amortization	1,139		851
Intangible assets — net	$	301	$	589

Estimated remaining amortization expense for each of the subsequent fiscal years is expected to be as follows:



($ in thousands)
Year	Estimated Future Amortization Expense
2018	$	288
2019	13
Total	$	301

The average amortization period remaining is approximately 1.05 years.