Long - Term Loan, Net of Discount and Issuance Costs - Additional Information (Details) - USD ($)	1 Months Ended		12 Months Ended
	Jan. 31, 2015	Jan. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Line Of Credit Facility [Line Items]
Warrants issued to purchase of preferred shares			975,644
Exercise price per share			$ 18.77
Financial expenses, net			$ 3,151,000	$ 144,000	$ 12,558,000
Credit Agreement
Line Of Credit Facility [Line Items]
Line of credit facility, current borrowing capacity		$ 52,000,000
Fair value of warrants converted to shareholders equity			2,864,000
Total discount amount			4,927,000
Original issuance discount amount			2,000,000
Amortization of deferred issuance costs			$ 500,000
Repayment of outstanding borrowing capacity					58,000,000
Financial expenses, net					$ 12,577,000
Credit Agreement | Credit Facility
Line Of Credit Facility [Line Items]
Debt agreement, maturity period		3 years
Accrued interest charge, capitalized as additional principal			11.00%
Credit Agreement | LIBOR
Line Of Credit Facility [Line Items]
Basis spread on variable rate			1.50%
Credit Agreement | LIBOR | Floor rate
Line Of Credit Facility [Line Items]
Interest on the outstanding loan			0.50%
Credit Agreement | Preferred H Shares
Line Of Credit Facility [Line Items]
Warrants issued to purchase of preferred shares		975,644
Exercise price per share		$ 18.77
Term Loan
Line Of Credit Facility [Line Items]
Debt agreement, maturity period	5 years
Line of credit facility, current borrowing capacity	$ 25,000,000
Interest on the outstanding loan			10.00%
Line of credit facility, maximum borrowing capacity	$ 100,000,000
Line of credit facility, remaining borrowing capacity			$ 75,000,000
Funding fees payable			1.50%
Prepayment fee percent			0.75%
Due date of outstanding principal loan			Jan. 31, 2020
Frequency of payments			Quarterly
Term Loan | Other Long-term Assets
Line Of Credit Facility [Line Items]
Original issuance discount amount			$ 491,000
Additional issuance costs			$ 1,739,000
Term Loan | First Year
Line Of Credit Facility [Line Items]
Prepayment fee percent			3.00%
Term Loan | Second Year
Line Of Credit Facility [Line Items]
Prepayment fee percent			2.00%
Term Loan | Third Year
Line Of Credit Facility [Line Items]
Prepayment fee percent			1.00%