Commitments and Contingent Liabilities - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	0 Months Ended	3 Months Ended	12 Months Ended
	May 21, 2013	Mar. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Operating lease commitments period description		The Company rents its facilities in all locations under operating leases with lease periods expiring from 2014 - 2016. The lease agreements of VSL include extension options. VSL leases cars for its employees under operating lease agreements expiring at various dates from 2014 - 2016
Total rent expenses		$ 501	$ 1,636
Line of credit	15,000
Line of credit, Maximum borrowing period	Jun. 30, 2015
Line of credit, Prime Rate, minimum	3.25%
Line of credit, basis spread on variable rate	6.25%
Interest rate at period end		9.50%
Line of credit, interest expense		0
Promissory Note [Member]
Property, Plant and Equipment [Line Items]
Line of credit, Maximum borrowing period		Mar. 31, 2015
Line of credit, basis spread on variable rate		0.15%
Interest rate at period end		3.10%
Line of credit, interest expense		0
Maximum borrowing capacity		7,000
Borrowed amount under promissory note