Income Taxes (Deferred Tax Assets and Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Deferred Tax Assets
Operating loss carryforward	$ 3,197	$ 1,919
Accounts receivable allowance	69	106
Texas tax credit carryforward	221	228
Stock option compensation	1,070	1,306
Goodwill	602	723
Accrued expenses	120	121
Alternative Minimum Tax credit carryforwards	16	16
Total deferred tax assets	5,295	4,419
Deferred Tax Liabilities
Property and equipment	(397)	(514)
Prepaid expense	(71)	(80)
Total deferred tax liabilities	(468)	(594)
Valuation allowance	(4,606)	(3,597)	(2,800)
Net deferred tax assets	$ 221	$ 228