Income taxes (Tables)

12 Months Ended

Dec. 31, 2017

Income Tax Disclosure [Abstract]

Schedule of Components of Income Tax Expense (Benefit)

The following summarizes the (benefit) / provision for income taxes:

Years Ended December 31,	2017		2016		2015
(in thousands)
Current:
Federal	$	(3,690)	$	4,981	$	174
State and local		532		567		2
		(3,158)		5,548		176
Deferred:
Federal		4,293		949		2,460
State and local		(288)		131		308
		4,005		1,080		2,768
Expense for income taxes	$	847	$	6,628	$	2,944

Schedule of Effective Income Tax Rate Reconciliation

Reconciliation of the Company's actual tax rate to the U.S. Federal statutory rate is as follows:

Years ended December 31,	2017			2016			2015
Income tax rates
- Statutory U.S. federal rate		35	%		35	%		34	%
- State income taxes, net of federal benefit		4	%		3	%		4	%
- Excess tax benefits related to stock compensation		(20)	%		—			—
- Effect of 2017 Tax Act		(12)	%		—			—
Total		7	%		38	%		38	%

Schedule of Deferred Tax Assets and Liabilities

The net deferred income tax assets (liabilities) consisted of the following at:

December 31,	2017		2016
(in thousands)
- Depreciation &; amortization	$	(3,665)	$	(236)
- Reserves for doubtful accounts		115		139
- Inventory reserve		218		304
- Non qualified stock options		409		247
- Net operating losses		1,450		2,078
Total	$	(1,473)	$	2,532