Income Taxes (Details 3) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Deferred tax assets:
Allowance for doubtful accounts	$ 508	$ 492
Accrued liabilities	1,787	1,131
Stock-based compensation expense	629	499
Net federal, state and foreign operating loss carryforwards	922	288
Deferred tax assets	3,846	2,410
Deferred tax liabilities:
Intangible assets, property and equipment, principally due to difference in depreciation and amortization	7,677	6,990
Net deferred tax liabilities	(3,831)	(4,580)
Less valuation allowance	(584)	(263)
Net deferred tax liabilities, net of valuation allowance	$ (4,415)	$ (4,843)