Debt (Details Textual) (USD $)	3 Months Ended		0 Months Ended	3 Months Ended	0 Months Ended	3 Months Ended
	Mar. 31, 2014	Jan. 17, 2014	May 08, 2014 Subsequent event [Member]	Mar. 31, 2014 SunTrust Bank [Member]	Jan. 19, 2010 Sun Trust Term Loan [Member]	Mar. 31, 2014 Sun Trust Term Loan [Member]	Mar. 31, 2014 Sun Trust Term Loan [Member] Minimum [Member]	Mar. 31, 2014 Sun Trust Term Loan [Member] Maximum [Member]	Mar. 31, 2014 Sun Trust Revolving Credit Facility [Member]	Jan. 17, 2014 Sun Trust Revolving Credit Facility [Member]	Jan. 19, 2010 Sun Trust Revolving Credit Facility [Member]	May 08, 2014 Sun Trust Revolving Credit Facility [Member] Subsequent event [Member]
Line of Credit Facility [Line Items]
Four-year revolving credit & Term Loan agreement				Jan. 19, 2010
Period of term loan and the revolving credit facility				4 years	4 years
First payment on the term loan						Mar. 31, 2010
Committed revolving credit facility					$ 15,000,000.0				$ 25,000,000.0	$ 25,000,000.0	$ 15,000,000.0
Committed term loan					15,000,000.0
Revolving credit facility outstanding									0
Term loan requires quarterly principal payments						800,000
Frequency of payment				Monthly		Quarterly
Term loan final principal payment						3,000,000
SunTrust term loan, Line of credit facility, frequency of payment				Quarterly
Index rate used as reference for interest rate on revolver and term loan				One-month LIBOR rate
Applicable margin (percent)							2.25%	3.50%	1.75%
Revolving Credit facility and Term Loan interest rate (percent)		1.75%							1.90%
Revolving Credit facility commitment fee (percent)									0.50%
Credit facility, covenant compliance	The SunTrust credit facility requires, as of the end of each fiscal quarter, the Company to have achieved Consolidated Adjusted EBITDA (as defined in the agreement) of at least $22.5 million for the immediately preceding four quarters. As of March 31, 2014, the Company's Consolidated Adjusted EBITDA for the preceding four quarters was $22.2 million, and therefore the Company was not in compliance with the covenant, although there were no amounts outstanding under the credit facility as of that date. On May 8, 2014, the Company entered into an amendment of the SunTrust credit facility that provided a waiver of the non-compliance with the minimum Consolidated Adjusted EBITDA covenant for the quarter ended March 31, 2014 and reduced the minimum Consolidated Adjusted EBITDA requirement to $18.0 million.
Credit facility, covenant for minimum Adjusted EBITDA									22,500,000.0			18,000,000
Credit facility, covenant, adjusted EBITDA, actual									22,200,000
Stock repurchase program, increase to amount authorized			10,000,000.0
Stock repurchase program, amount authorized			$ 20,000,000.0