Debt (Details Textual) (USD $)	0 Months Ended	12 Months Ended			0 Months Ended	12 Months Ended					1 Months Ended	12 Months Ended	46 Months Ended
	Jan. 19, 2010	Dec. 31, 2013	Jan. 17, 2014 Subsequent event [Member]	Dec. 31, 2013 Subsequent event [Member]	Jan. 19, 2010 SunTrust Bank [Member]	Dec. 31, 2013 SunTrust Bank [Member]	Dec. 31, 2013 SunTrust Bank [Member] Minimum [Member]	Dec. 31, 2013 SunTrust Bank [Member] Maximum [Member]	Dec. 31, 2013 SunTrust Bank [Member] LIBOR [Member]	Dec. 31, 2013 Sun Trust Term Loan [Member]	Dec. 31, 2013 Sun Trust Term Loan [Member] SunTrust Bank [Member]	Dec. 31, 2013 Sun Trust Term Loan [Member] SunTrust Bank [Member]	Dec. 31, 2013 Sun Trust Term Loan [Member] SunTrust Bank [Member]	Jan. 19, 2010 Sun Trust Term Loan [Member] SunTrust Bank [Member]	Dec. 31, 2013 Sun Trust Revolving Credit Facility [Member]	Dec. 31, 2013 Sun Trust Revolving Credit Facility [Member] SunTrust Bank [Member]	Jan. 19, 2010 Sun Trust Revolving Credit Facility [Member] SunTrust Bank [Member]	Jan. 17, 2014 Sun Trust Revolving Credit Facility [Member] SunTrust Bank [Member] Subsequent event [Member]
Line of Credit Facility [Line Items]
Period of term loan and the revolving credit facility					4 years
First payment on the term loan	Jan. 19, 2010									Mar. 31, 2010
Committed revolving credit facility			$ 25,000,000	$ 15,000,000												$ 15,000,000.0	$ 15,000,000.0	$ 25,000,000
Committed term loan														15,000,000.0
Revolving credit facility outstanding															0	0
Revolving credit facility, quarterly principal payment													800,000
Final principal payment											3,000,000	3,000,000
Frequency of payment										Quarterly
Variable interest rate, term									1 month
Description of variable rate basis		One-month LIBOR rate
Applicable margin (percent)							2.25%	3.50%	2.25%
Revolving Credit facility and Term Loan interest rate (percent)						2.43%
Revolving Credit facility commitment fee (percent)						0.50%
Term loan, weighted average interest rate											4.10%	4.10%	4.10%
Mandatory principal payments on SunTrust term loan												$ 3,000,000
Fixed interest rate (percent)			1.75%															1.75%
Debt Instrument, Term		4 years