Income taxes (Tables)

12 Months Ended

Dec. 31, 2016

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,	2016		2015		2014
(in thousands)
Current:
Federal	$	4,981	$	174	$	0
State and local		567		2		(49)
		5,548		176		(49)
Deferred:
Federal		949		2,460		(767)
State and local		131		308		(90)
		1,080		2,768		(857)
Expense (benefit) for income taxes	$	6,628	$	2,944	$	(906)

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,	2016			2015			2014
Income tax rates
- Statutory U.S. federal rate		35	%		34	%		34	%
- States, net U.S. benefits		3	%		4	%		4	%
- Tax benefit from prior year		0	%		0	%		18	%
Total		38	%		38	%		56	%

Schedule of Deferred Tax Assets and Liabilities

Elements of deferred income tax assets (liabilities) are as follows:

December 31,	2016		2015
(in thousands)
Deferred tax assets (liabilities)
- Depreciation & amortization	$	(236)	$	(412)
- Reserves for doubtful accounts		139		127
- Inventory reserve		304		250
- Non qualified stock options		247		108
- NOL		2,078		3,430
- AMT credit carryforward		—		160
Total	$	2,532	$	3,663