Debt (Details) (USD $)	6 Months Ended
	Jun. 30, 2013
Debt Instrument [Line Items]
Common stock repurchase permitted	$ 400,000
LIBOR [Member] | Maturity Period of Libor 1 [Member]
Debt Instrument [Line Items]
Maturity period of loan	30 days
LIBOR [Member] | Maturity Period of Libor 2 [Member]
Debt Instrument [Line Items]
Maturity period of loan	60 days
LIBOR [Member] | Maturity Period of Libor 3 [Member]
Debt Instrument [Line Items]
Maturity period of loan	90 days
Line of Credit [Member]
Debt Instrument [Line Items]
Borrowing capacity under line of credit facility	6,000,000
Common stock repurchase permitted	400,000
Date of maturity of loan	Jul. 01, 2015
Outstanding borrowings under line of credit facility	2,600,000
Line of Credit [Member] | Prime Rate [Member]
Debt Instrument [Line Items]
Description of variable rate basis	prime lending rate
Variable interest rate (in hundredths)	3.25%
Line of Credit [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Description of variable rate basis	LIBOR
Variable interest rate (in hundredths)	2.00%
Leasehold Improvement [Member]
Debt Instrument [Line Items]
Date of maturity of loan	Mar. 31, 2014
Maturity period of loan	2 years
Term loan facility, amount	65,000
Imputed interest rate (in hundredths)	3.25%
Number of monthly installments	24
Amount under monthly payment of term loan	2,800
Unpaid balance of loan	$ 25,000