Commitments and Contingent Liabilities - Additional Information (Detail) (USD $)	6 Months Ended	12 Months Ended	6 Months Ended
	Jun. 30, 2014 Floors	Dec. 31, 2013	Jun. 30, 2014 Promissory Note [Member]	Mar. 31, 2014 Promissory Note [Member]
Commitments And Contingencies [Line Items]
Operating lease commitments period description	The Company rents its facilities in all locations under operating leases with lease periods expiring from 2014 - 2026. VSL leases cars for its employees under operating lease agreements expiring at various dates from 2014 - 2017.
Total rent expenses	$ 1,007,000	$ 1,636,000
Lease beginning period	Jun. 18, 2014
Lease additional period	5 years
Lease expiration date	Feb. 26, 2026
Number of leased floors	2
Maximum borrowing capacity				7,000,000
Line of credit, basis spread on variable rate			0.15%
Interest rate at period end			3.10%
Line of credit, Maximum borrowing period			Mar. 31, 2015
Borrowed amount under promissory note			0
Line of credit, interest expense			$ 0