10. Income taxes (Tables)

12 Months Ended

Dec. 31, 2016

Income Tax Disclosure [Abstract]

Provision for income taxes

	For the Years Ended December 31,
	2016			2015
Current:
Federal	$	2,117		$	1,888
State and local		572			717
Total current		2,689			2,605
Deferred		(531	)		(585	)
Provision for income taxes	$	2,158		$	2,020

Reconciliation to effective rate for income taxes

	2016						2015
	Amount			Percentage			Amount			Percentage
Federal income tax expense computed at the statutory rate	$	1,917			34.0%		$	1,357			34.0%
State and local tax expense, net		320			5.7%			337			8.4%
U.S. domestic manufacturers' deduction & other permanent differences		113			2.0%			300			7.5%
Changes for tax positions of prior years		(202	)		(3.5	)%		50			1.3%
Change in tax rates		2			0.0%			–			—%
Change in tax estimate		8			0.1%			(24	)		(0.6	)%
Provision for income taxes	$	2,158			38.3%		$	2,020			50.6%

Schedule of deferred tax assets and liabilities

	December 31,
	2016			2015
Non-current deferred tax assets (liabilities) arising from:
Accumulated depreciation and amortization	$	(1,854	)	$	(1,719	)
Total non-current net deferred tax liabilities		(1,854	)		(1,719	)
Current deferred tax assets arising from:
Capital loss carry-forward & investment impairment		166			164
Unrealized losses (gain) on investments		–			45
Share-based and other compensation		126			–
Inventory		331			308
Allowances for doubtful accounts and discounts		39			39
Total current deferred tax assets		662			556
Net deferred tax liability	$	(1,192	)	$	(1,163	)

Reconciliation of amount of unrecognized tax benefits

	2016			2015
Balance at January 1	$	265		$	215
Additions for tax positions of prior years		63			50
Release for tax positions of prior years		(265	)		–
Balance at December 31	$	63		$	265