Line of Credit - Additional Information (Details) - USD ($)		12 Months Ended
	Mar. 15, 2012	Dec. 31, 2015	Dec. 31, 2014
Line of Credit Facility [Line Items]
Proceeds from line of credit		$ 0	$ 0
Available line of credit	$ 30,000,000
Minimum cash balance required to maintain under the credit agreement	$ 25,000,000
LIBOR | Minimum
Line of Credit Facility [Line Items]
Line of credit basis spread on variable rate	1.50%
LIBOR | Maximum
Line of Credit Facility [Line Items]
Line of credit basis spread on variable rate	2.00%