Revolving Line of Credit and Term Loan - Additional Information (Detail) (USD $)	12 Months Ended			0 Months Ended				12 Months Ended
	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2013 Term Loan	Mar. 23, 2014 Subsequent Event	Mar. 21, 2014 Subsequent Event	Mar. 21, 2014 Subsequent Event Term Loan	Dec. 31, 2013 Silicon Valley Bank	Dec. 31, 2013 Revolving Credit Streamline Facility
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity							$ 6,500,000
Borrowing Base							75.00%
Bear interest rate	Greater of the bank's prime rate or 4.00% plus 4.75%							Greater of the bank's prime rate or 4.00% plus 2.00%
Interest rate	4.00%							4.00%
Line of credit facility, expiration	Sep. 30, 2014
Interest rate excluding prime rate	4.75%							2.00%
Line of credit, facility fee	0.50%
Reserve credit of subsidiary	500,000
Final payment fee	40,000	60,000
Termination fee	8,400,000
Borrowings outstanding under line of credit facility	0				0
Loan amount			2,000,000			2,000,000
Bank fee paid				$ 10,000